Period like cramps at 35 weeks

Hey ladies.

This morning my boyfriend and I were really feeling good and ended up having some really good sex. TMI but I haven’t had sex in the last 4 months. I was never in the mood. These last couple of days I woke up with some light cramps nothing too serious. Well after sex (I didn’t even orgasm) but he did cum inside of me, I’ve been feeling crampy all day.

I’m 35 + 4 weeks pregnant. Is this normal? I have an appointment tomorrow so I plan on asking then. I just don’t wanna go to the hospital if I don’t have to.

My little girl also has a single umbilical artery and I have an anterior placenta. I don’t know if that would do anything. A single umbilical artery means she has an umbilical cord with one artery and one vein instead of 2 arteries and a vein.

Thank you!