15...and pregnant??

I need some help. Im 15 and think I might be pregnant. I had unprotected sex 2 weeks ago and again a lil over a week ago. Last Wednesday I started getting these wierd feelings in my lower tummy, its kinda a full feeling. I also have been wanting to eat constanly even when im not hungry, my boobs were sore but only for a day, ive been moody, and bloated. ever since last week I have been having a feeling I could be pregnant. But last Sunday I started my period so I thought well im not pregnant, then I started reading more and some people have had periods when they were pregnant. Mine was pretty heavy until this morning and it started to get really light and its a pinkish color, its so light I dont even need to use protection. I never have had this happen to me before, I usually have a regular period. Im really worried im pregnant. I have this really strong gut feeling I am. Do you think I could be? if anyone has any advice or can plz help me email me at brittney2k5@yahoo.com thanx all!!