Unprotected sex four times while I was ovulating could I become pregnant?

Hi I'm 19 years old. I think I'm pregnant but I'm not completely sure I was hoping some of you could help me out and give me some of your opinions. So me and my boyfriend have been together for about 4 years now and we have always had unprotected sex. Well last month he started cumming inside of me Everytime. We had sex about every day sometimes twice a day the week before my period. The week of my period and right after I was off my period which was during my ovulation days. I'm not on any kind of birth control and for the past week I have noticed a few little changes of my body. I get tired really easy and catch myself taking random naps during the day which I never used to do at all. I get random headaches and when I eat I can never get full. I have been craving odd foods that I never used to really eat and I find myself going to the bathroom more then ever before. My stomach has gotten just a little bigger and it's really tight feeling. My boobs have gotten bigger and they are really squishy feeling. I'm supposed to get my period in two weeks and if I don't I'm going to take a HPT. I was just hoping to get a few opinions on if you guys think I could possibly be pregnant or not.