Low Hcg

Hey y’all - ovulated 5/5. I got my first BFP on 5/15 (10dpo). I’ve been crampy on and off (no bleeding at all) and called my doc on 5/20 (15dpo) because I have a history of mc and wanted to see how my numbers looked. She called me back Thursday to tell me my hcg was 44. Wants to retest in a week to see where I’m at then. I know it really only matters to see the numbers doubling over 48ish hours but has anyone been here with success? It’s killing me to have to wait so long so I’m hoping someone has some experience that could keep me positive lol :) here’s my progression in case anyone is interested (I’m obsessed with these idk why lol)