I don't know what's wrong with me.

I don't know what's wrong with me. I felt fine when I woke up, but sometime this morning just started feeling really badly. Tried drinking some soda water, and that helped a little. Eventually tried taking a zantac and I guess that helped a little part of it, but the wonky head and the generally yucky, achy, vaguely unidentifiable stuff is just hovering like a miasma. Stress? Weather change? Moulting? I just want to feel better.