Why do I get dizzy, have a yeast infection, gassy, frequent urination, & bowel movements a lot? Had sex oct 22, 2015. Too soon to do pregnancy test?

You should check. the pregnancy test 2-3 weeks after the initial intercourse, and if that is negative check again 1 week after. Given those symptoms the reason could be anything, ranging from pregnancy to indigestion to Urinary tract infection to PMS. Though PMS frequently brings about headaches and body ache.