Help or at least try and help?

So this morning I got up at 8:30 to go to a interview i got home about 9:20 with the place only being 2 blocks away I got home and started to feel Ill to my belly I know the bug may be going around but I don't think i may be that i felt fine after i took a nap well a little after that my legs feel like jello I can barely stand with out feeling like I'm gonna fall over and get light headed anyone know what may be going on I have been drinking lots of water to keep hydrated I don't want to go to the ER if I don't have to