What the hell is this?

I have not experienced this in a little over 3 years... and this is way too much 🤤 I've had this before but not like this... I use to have big blood clots but not in pairs this is a pair and what's weird is that they are both the same size🙈 before this happened... My legs were hurting like crazy my lower abdominal area started throbbing and my lower back was hurting... after I felt the flow drop, my body started feeling warm and now I just feel tired. It's scary because about 7 months ago I had uterine cancer. I would hate to think that I'm back where I started... i do have an appointment with my OBGYM today so I'll definitely be telling her about this! 😔