pregnancy or pms ... give me guidance please!?

[Kaci]

ever since i started having sex my cycles went down to 25/26. i dont use protection because we arent "trying" we are just going with the flow. i did have sex around and a day after i felt "ovulation cramps" and my estimated ovulation day. witch was the 19th. now my period is about 5 days away and my boobs are hard, a little bigger and sore. when i walk down the stairs they hurt slightly. i havent really had any other symptoms besides gassy and burping alot. this morning i burped a little bit of throw up came out (sorry) and also vivid dreams, one was me pregnant with twins, the rest not related to pregnancy. yesterday evening i took a first response, came out negative. this morning i took one too it was negative. i would say i about 10 days after ovulation. my period is due on the 3rd. what to doooooo? i am also very tired, and started crying out of nowhere. i dont usually get period symptoms besides cramps