Unless you did something that would attract spirits with bad energy, then no that is not normal. However from what I have read, you really can't AP Accidentally. However I am new and Not knowledgeable on any of these subjects, however I have learned a little from the forum posts of others and the replies of those who know what they are talking about. Take my advice with a grain of salt. I am still a beginner.
Im pretty new too but Im pretty sure you cant accidently AP as well. You could have just had a bad dream, somebody could have casted an illusion on you, a spirit might have been trying to get your attention or scare you, and Im sure that there are many other explanations but thats all I can really tell you right now. I dont know if there is a place in the astral with a lot of bad spirits, but shamans and people in many other cultures used to do rituals to somehow go into a world of there own subconcios mind where they would find inner peace, learn more about themselves, increase there powers, or battle and conquer there inner demons (not literal demons) to rid themselves of their fears. Its like an astral plane within you thats a reflection of yourself. You could have somehow fallen into your subconciose(very unlikely) and come across you inner demons. Or you could have been tired and half asleep lol but as I said Im still new and it could have been alot of things.
From my experience you can Astral Project accedently. It's like lucid dreaming, for me it happens occasionaly when I'm actualy asleep. When I realise its not just a lucid dream I have always woken up. For me it has been more of an intence astral projection, but I have been astral projecting for years on an almost daily basis. Borrowing the words from a gentalmen that I have been talking to recently, their is a pospility that your body has got so used to trying over the years...., I know as the mind gets stronger the body finds it easyer to do stuff like that.
Simply, the phenomena astral projection it involves visiting the astral plane by separating your mental body or subconscious from the physical body and then visiting other localities.
These localities can be either close by or far away and are normally determined by subconscious factors when happening accidentally during sleep as dreams. A trained or expert astral traveler has the ability to visit and connect with specifically chosen locations! Your first Astral projection For Beginners experience normally happens by accident!
Unless you are already skilled in the world of astral projection, then for the most part, any experiences you may have already had are probably either by accident or as a result of your subconscious mind and its reactions to the events you are currently experiencing or have unresolved in your life.
Actually this is one of the most common astral projection experiences. Not all of the people project for the practice, some of them just naturally get it. Also basically every human being projects at least once to the astral plane, accidentally or by trying and practicing.
Some other accidental astral travels occur when we are dreaming. people has always experienced the most real sensation of being able to fly and also being totally aware of it while actually still in the dream. Furthermore , just about everyone of us has experienced the sharp jolt and fright when we dream of falling and miraculously seem to wake up just before make that dreaded impact with the ground. This is probably the category of projection you have performed accidentally.
Also happens when the physical body has undergone extreme trauma. Surely you would have heard of stories where people going through a near death experience such as a heart attack, stroke, car accident or even a major surgical procedure recall and report that at various times they seemed to be hovering up above their physical body and looking down viewing, hearing and being aware of the whole situation. This is considered accidental astral projection as well, due to an undergone extreme trauma ( though, what you had has no connection to it, but it i have brought this up to give folks an example of unprevented and wanted astral projection experience).
Of course some of these are really just dreams plain and simple however do not totally disregard the fact that you just may have instead had a subconscious astral travel or astral projection! So keep in mind that it could have been an astral travelling or a regular drem but if you really sensed energy and you do know how astral projection feels like, most likely you projected, as i said. Dream or not, accidental astral projections do happen to people at least once in a lifetime, this is very common and regular.
If this is a regular occurrence for you then you really should find out more about honing this natural ability, using some Astral projection For Beginners tools and getting the most out of astral projection!