hcg rising but not doubling

I’m 6 weeks today but feeling discouraged since I got a phone call from my doctor saying hcg hasn’t risen as much as they’d like. Waiting for an ultrasound next week.

First two blood draws last week more than doubled from 1189 to over 2500. But from Thursday to Tuesday they had only gone up from about 2500 to about 7300.

Does anyone have any helpful advice or positive stories to share?? Would love to hear ❤️