Weird spotting?

My husband and I have been trying to get pregnant for a little over a year. We have been having a lot of sex lately. Two days ago when I would wipe it the toilet paper was kind of pinkish. I didn’t think much of it. I assumed it was the start of my period. There wasn’t anything other than when I wiped. Then yesterday I thought my period had started. It was light but that’s kind of normal. Today it’s more of a rusty brown and once again it’s only when I wipe. Why is my period being so weird?