Hi runningmommy,
I seem to have similar thing. I was having a heartburn (never really had one but I can guess) of sort but instead of being in the chest, it was in my stomach. Came on sudden. I been feeling crummy too so I haven't been on the bike for a whole week. Had a migrane yesterday, and still have a touch of it this morning. so no ridey ridey... I may try a trainer again.
Strange no fever, just feeling exhausted and tired.
smilingcat