Should I worry?

Ok so baby daddy came to town to see his children. I seen it as an opportunity to scratch that itch. Nothing more and nothing less. I was a day off my period and feeling good. He’s been the only man I slept with in the past few years and I want to keep it like that. We didn’t use protection and it was so good we did it the next day too. Last week While using the bathroom I wiped and a spot of blood appeared. But that was it. Fast forward to this week my period was suppose to come yesterday. No period! I’ve been gassy with mild cramps for a week. So I don’t know if I should be concerned. Oh yeah forgot to mention 9 months pp.