Help! Is My Betta Sick Or What?

If he's facing up as in being vertical, it could be too much ammonia in the water. Do a 80% water change now, and check your water parameters daily to make sure they're OK. Do you have a cycled filter and do weekly water changes? If no filter, then you need to do 100% water changes every three days to make sure that wastes don't build up (which act like acid to the fish). You have a heater too, right? Bettas are tropical, they can't be happy in room temperature water, much less because it won't be stable and fluctuate a lot.