im 15 weeks perganant and my breast are very sore

pregnancy symptoms and pms symptoms are very similar, and you may get no symptoms at all if you are pregnant. The only way to tell is to do a pregnancy test when your period is due

trina,
dont get your head wrapped around pregnancy symptoms, because the more symptoms you hear about your body can end up tricking you into thinking you are pregnant when your not.

not everyone gets pregnancy symptoms either, and since you seem worried about being pregnant, you could be making them up in your head without knowing it.

if you want to know if your pregnant or not, dont look for the pregnancy signs, but get a pregnancy test or see a doctor.
those are the only ways you will know if you are for sure pregnant or not.