I just don't know

Nicole
About a week ago my boyfriend and I had sex and he ejaculated inside me. At that time I had been in the pill for a month and took one pill a few hours late a few days before but continued the rest regularly. ( I now have a permanent alarm on my phone so I'll never forget.) Yesterday I was supposed to start my period, I've had some spotting and cramping today but normally my periods are 50 times heavier. I've been eating a lot and I feel like I'm constantly hungry. I don't know if it's my period and it's just messed up or if I'm pregnant. I'm hoping it's my period though cause I'm in college and not ready to start a family.