Anxiety after bfp's

Emily
Tubal reversal was March 30th, 2015. Had a bpf a month later and miscarried at 5w6d. My hcg started off very low (16) on 13dpo but doubled up until I started bleeding. 9 months later I got my bfp with an hcg of only 34 14dpo (on Wednesday). I can't help but think im going to miscarry again. Anyone have a good outcome with low hcg at this point? Blood work again tomorrow and will hear back on Tuesday.