Pregnancy after loss

I had a miscarriage on August 22nd. I was 4weeks 6 days. My HCG was 16 in the er and 0.5 6 days after. I took a digital and line test and both were clear negatives. I started using opk and I got my peak on Thursday the 3rd of September. This Tuesday I got my bfp. I took two clear blues and two FR. I’m terrified I will have another miscarriage. Is there anyway to know if this pregnancy will stick or be a chemical? What have guys done to try and stay calm and positive with your pregnancies after a loss? I feel like I’m going nuts. I’m over analyzing every little thing I feel whether it’a a cramp or cm or sore breasts etc.