Can I be bleeding and pregnant?

So for the past month my bf and I have been trying to have a baby. He came in me almost everyday since July 16th(which was during my last period). I’ve been feeling nauseous, having headaches, my boobs began to hurt, super tired, and bloated. My period is due in 2 days but yesterday I woke up from a nap with cramping and when I went to the bathroom their was bright red blood. The pad wasn’t filled up all the way but it was a lot less then my usual periods so to me it was light. Also their are no clots it’s just watery red blood.

Idk if this means I’m have a miscarriage, implantation bleeding, or it’s juts my period coming early?

If this has happened to you what was it?