low betas :( need you prayers!

Lilly2013

Got my BFP last friday the 17th (used a digital coz the line was very faint), same day beta was 31, nurse said its positive but low.. I think it was 9-10DPO (using OPKs and charting CM as period is irregular so cannot use LMP which was end of Feb).

3 days later (yesterday) beta is 54, nurse was expecting it to double (60-70).. I'm going in again on thursday.. but im very worried! i know if it doesn't stick it's only because it is not as healthy as it should be and i know there is nothing I can do about it...yet im feeling very down!

So far i'm cramping but nothing very painful, a little backache every now and then and brown spotting on and off...

Appreciate your peayers and support