I can really feel how worried you are, and it's natural to feel scared when your doctor mentions the numbers aren't climbing as fast as they'd like. But honestly, HCG can be tricky to interpret on its own, and there's quite a bit of variation that's still okay, so please don't spiral before you see your gyne tomorrow. She'll have the full picture and can do a scan to check what's actually happening, which matters so much more than the percentage alone. Try to rest tonight and get through to tomorrow when you'll have proper answers. You're doing the right thing by keeping that appointment.