Afraid and needing advice.

So I will start with a little history... In January I got pregnant for the very first time, ever! We were ecstatic! Unfortunately I lost that baby at 5 weeks and 1 day. Now fast forward to April -- The first day of my last period was April 20th and my cycles are now since the MC usually 30 days long and NEVER late. I always start my period the morning of the day it's supposed to come, just like clockwork. Well this Month it was 3 days late and even though I started testing from 9 DPO to then I had NO trace of any kind of line until 14 DPO. On 14 DPO I finally got my BFP! Glory be to God!! This was just this past Sunday, the 22nd. Well yesterday Monday the 23rd I got my beta levels taken and I got the call this morning that they're only 24. I am so scared to lose this baby. The doctor said I should be 5 weeks today and those numbers are low. I'm getting more bloodwork done tomorrow, but I could really just use some input. I'm not bleeding or cramping, but still very afraid.