What kind of CM is this?

I had my egg retrieval for IVF in beginning of July… I had a period one week later and currently am waiting for my next period prior to FET. If I ovulated on time, this would have been 4 DPO. I’ve never had CM like this before. Even though we’re doing IVF, we still are “trying” to get pregnant. Wondering if anyone has had something like this? I am due for my period in about a week. It was super sticky and like nothing I’ve ever seen before. We have been TTC 15 months.