What is this ?

Okay so I am on the pill I’ve been on it for a while now but last month I had a scare since I had been taking it horribly and my “period” was extremely barely there I’m talking about just some really light pink stuff going on but anyways I took 2 tests and it came out negative also this month I did end up getting my period like normal but I woke up today with cramps and I have never really gotten them before and I wiped and there was this I don’t really know what it is can someone help ?