Pregnancy anxiety after infertility

My husband and I recently got pregnant after 19 months of infertility and we are due February 27th! I am truly an anxious wreck. I did my betas and my second was 2 points shy of doubling. My 3rd was 10 points over doubling. Still waiting to hear from the dr about my 3rd beta but I’m not sure i can handle the anxiety of more betas. I can’t help but wonder why they aren’t rising faster than double like i see so many Women’s do. I just am so scared this baby won’t stick around. I don’t have any prior losses but i think when you’re in the world of infertility it’s just hard not to consider that as an option. Does anyone feel the same? Anyone have tips to stay positive?