I think I might be pregnant

I think I might be pregnant I started my period on 4/3/08 and was off on 4/7 my boyfried and I had sex on the 10,12,14,19,20,21,26,27 and now I boob are tender and has been since the 20th of this month (normal my boobs dont start getting tender until a week before my periods comes) also when I sleep at night I cant sleep on my tummy becuase of my boobs and in the morning I have sharp pain on the left said of my tummy for like the last past two days but only in the morning so how big of a chance might I be pregnant, I usaully always get my period on the first of the month or on the 3rd of the month

I think you should just get a pregnancy test. If you can't afford it, have your boyfriend buy it. You may need to go to a doctor. I'm 54 and have had 3 children. I never had pain in my breasts or in my stomach (except for contractions, of course) and I've never known of anyone who had pains there. If the pain is on the left (or right) side of your stomach, it could be a kidney stone or something else. You need to get to a doctor.

Why are you not using protection?

you sound pregnant to me, but if you having pains you might be trying to miss carry

Take a test...or see a doctor. Those are the only certain ways to know.