The power of suggestion is very strong. I can suggest Pink Elephant and there ya go, you're all seeing a pink elephant in your heads, even for a second, I put it there. Now you're talking about a thought you focused on and desired.
Unless one day you wake up with wings on your back. The "feeling" is just your mind.
I can't say if you're crazy or not. Let's be honest. But what you're experiencing is not anything abnormal. Such things as anxiety and hypochondria are perfect examples of how the mind can cause us to feel physical symptoms, pain, or sensation without a physical cause. Everyone has their anxiety and hypochandriac moments. Some women fear becoming pregnant so much that their period will be very late or even skip a few months and they will begin experiencing morning sickness! Ever seen a creepy spider and can't stop feeling itchy or like something is crawling on you?
Eventually, by ignoring this "feeling" or finding ways to get your mind off of it, it will go away. But you thinking about it and focusing on this feeling will only increase the power of this thought.