Hi! I know I responded earlier, but I felt compelled to respond again because I was feeling exactly as you were regarding my hcg levels. Having previous losses or even going through this IF battle, really does a number on our minds and it is difficult to not worry about every little thing.
I also thought I could possibly have a molar pregnancy. My numbers at 12 dpo -270, 14dpo -730 and 21dpo - 8,877. They were rising and doubling as they should, which should have been comforting to me, and while on one hand it was, I was also nervous that the high number (8,877) indicated it could be a molar pregnancy. I have come to learn molar pregnancies have MUCH higher hcg levels early on. It is not easy to relax, and I'm not going to even tell you to, because it is just too difficult to not feel anxious. I know how nerve wracking this can be and I totally feel for you.
I know you are leaning towards not going back to your RE on Monday, but you do want to know what is going on. The 25th is only a few days later and really, you will be able to see so much more at that point that I would really urge you to alleviate the stress of seeing that RE again and just try to hold out for a few more days when you can see your OB. A few days makes all of the difference early on.
My old RE, whom I actually really liked...I realized after some time that he didn't believe in me or my body at all. As much as I liked him, I knew I had to go for another opinion because he was bringing me down. My new RE never once had anything but faith in me/my body from the very beginning. Don't let your RE steal your hope. I said it earlier, you have no reason to not have hope. I know you also want to protect yourself from pain and heartache and I completely understand that, but believe in yourself and your body and keep your hope alive. Sending big hugs to you.