I need to know Am I pregnant?

My boyfriend and I had unprotected sex in the beginning of May, and I had a period in late May but it came on a few days early and lasted almost 6 days! It usually only last 3. I also had a period in June but this time I spotted the 1st day and didn't start bleeding until the end of the second day, it lasted the normal 3. A few weeks before my June period I noticed that my boobs started to swell. they did not hurt until I finished my period. I just got off my period yesterday and my mom bought me a pregnancy test I took it and it was negative, yet my boobs still are very sore and I can feel the pressure in them. I think I should have waited to take the test since I just got off my period. Should I take another test in a week!?