Had sex, now having 1) vomiting 2) wish for sour/spicy food 3) dizzy 4) feel something in abdomen 5) mens date passed, but pregnant test -ve. what to do ?

Other causes: Women tend to think about pregnancy first when they get symptoms suggestive of it. Despite it being most common cause of those, other reason also exist. I would recommend that you get pregnancy off your list completely by repeating pregnancy test in 2 weeks. If still - ve, and the symptoms persist, see your doc. If the test is +ve, then see your doc to get it confirmed and established for care.