I had u protected sex a week and three days ago on ovulation, since then my breasts have gotten much larger and hurt all over for a bit now it's more over the nipples, my cervix and the surroundings are soft, swollen and low and tight, I get dizzy spells like I've stooden up too fast when I'm sat, my tummy above pelvic bone is hard and I have a lot of white ish discharge from my vagina, back hurts a lot and keep getting every other day cramping also urinating loads is this a period or pregnancy? I know it's too early to test as well what do I do?

All you can do is to wait. A pregnancy will start to manifest later around two weeks after you had the sexual intercourse .I think is your period since many times happen to me too in the past .Wish you good luck and if your period comes you should take some vitamins for dizziness.