Well, I haven't heard if it, but there's plenty I've not heard of. Excuse my typos, I'm on my phone and it has a touch screen. Anyways, I think maybe this could be a karma type thing. If you can find out more and remember more about this spell, you can find ways to undo it. Also, yhere are spells and such meant to undo spells. You could try some of those to undo what you did and undo what you think someone else may have done to you. It might be easier to undo your own spell, though, considering it's the energy that you put out there yourself. Also, apologize
To who you've put the spell in and ask for forgiveness. Also, if you believe in God or any form of Deity, you should apologize and ask for forgiveness from Them, too. Just do your best to make things right.