Mid cycle bleeding

I finished my period and about 7 days after, I woke up with cramping and noticed I had started bleeding during the night. It felt like normal period cramps and the flow was moderate to heavy for the first 2 days then tapered off but lasted for another 3.

This has never happened to me before - husband and I are TTC, but I know I wasn’t pregnant due to getting my period a week before. Talked to my OBGYN and she says she’s not worried because my labs are very good.

Just wondering if anyone has thoughts on this ... I feel like somethings off.