Hey Miri!
I think it is probably nothing: it's very easy to see the symptoms of certain illness as the oneselves, although they may be caused by absolutely different reasons. Internet has a great danger here! Even so, I recommend you going to the doctor. Perhaps it's not the best moment to go because you must to another one, but it will we worse if you're thinking about it again and again without professional advice. It may be another absolutely different problem: in that case, you'll hurt yourself more by not going and thinking too much about it. And, in case you're right, the sooner, the better!
Don't worry too much, please, but seek for a professional advice. That's what I would do.
*Gives a big hug!*