Low hcg

So last Tuesday I took a pregnancy test and had a vfl. I didn't think I even ovulated because I tried tracking around the time I normally ovulate and never got peak. Towards the 23rd of August I started to get a dark line but I ran out of ovulation tests and stopped just assuming I didn't ovulate. Anyways on September 2nd i tested and got a faint line (1st picture) since i have had 5 miscarriages I went the next day to get blood work and my HCG was 17 and my progesterone was 26. I am now on progesterone pills. Also because of the holidays weekend I can't go back to see if number a are doubling until Tuesday so im trying not to worry so much but today has been the worst of what if's. Anyone have success stories with low hcg and a successful pregnancy?