Okay so I had my period on the 18 of last month and I always have it for seven days straight. I usually get my next period every two months. So i should be expecting mine next month july. But i had Unprotected sex last week Monday. And my partner came in me when I stood up I felt this liquid running down my leg. I never had that happened before. And my boobs got a little bigger I was expecting my period to come but it didnt. When should I do a pregnancy test. ?