Could I be pregnant?

Recently on Saturday my period was coming to a finish, the blood was see through with a tint of red, me and my boy friend had sex on Sunday, maybe it's too early or what ever but I noticed I'm a lot more bloated, very tired, always wanting to eat and I'm constipated, I'm not experiencing tender breasts maybe a tiny bit when I press to see but I've been very very very bitchy, very moody and I get this weird feeling in my chest it's so much anger. I noticed my vaginal discharge is a lot more than usual and its abit sticky. I get pain around the bladder area and when my boy friend pushed to have sex today it hurt at first but later was okay? Btw we have unprotected sex!