Slow rising hcg?!

Tiffany • 32, married, ttc baby #1. I'm a fur momma, momma to an angel and a proud auntie 💜

So this is my beta hcg levels. They are going up but very slowly. The doctor thinks I'm like 3-4 weeks. Should I be concerned. I had a miscarriage in January and now I'm pregnant again. I just started on progesterone(vaginally) this week since my progesterone was super low. I just want this baby to stick!!! I won't get any answers until Monday and I'm trying not to stress about it. Please help ease my mind.