What is this?

Quick question for y’all. Has anyone experienced this or give me some advice on what it was for you?!

I have been on BC and my period this month was very unusual (spotted and very light blood for only two days and then nothing), I ran out of BC and haven’t been on it and am thinking this could be because of that but I’m not sure. I’ve been having a little pink tinged CM every now and again, nothing this big though, and I just went to the bathroom and had this. I’m so confused 🤷🏻‍♀️