While it's good to be aware of possibilities, DO NOT self-diagnose! Let a doctor do it or you're setting yourself up for hypochondria. Make your appointment, list your symptoms, but be open. This could be a simple fix, so don't overthink it. You've got enough of that going on already, sister. As my wise ol' Gramma used to say ... "Don't borrow trouble against tomorrow." She was absolutely right - Take care of today, first.
Now. If I could only start listening to my own - and Gramma's advice, I'd be GOLDEN!