Crazy update: my beta went from 80 to 50 to 316!

Has this happened to anyone?!

Why would a euploid embryo fail? My initial beta was only 80 and then it dropped to 50 on the second test. The embryo tested genetically normal. I have a follow-up with the doctor this week and I’m trying to gather all the questions I should ask. I just don’t understand what happened. My lining was good at transfer and I was doing POI and a little bit of estrogen after. It failed at what would’ve been 5 weeks, however the initial beta was only 80 so I’m not sure if it was destined to fail. I’m just so confused because all signs initially pointed to success. Now the Dr. says they’ll test for underlying immune and/or blood clotting issues. What do these even mean? And should I delay by getting an ERA? Thank you for any help/insights.