I’m so scared

I’m currently 4 weeks and 5 days pregnant and I started getting BFPs last week. I have had two miscarriages and an ectopic that resulted in me loosing my tube over the past 2 years. After my miscarriage in June, my OB sent me to an infertility doctor because I’m to young to be having these problems (I’m only 24). I guess all it took was a trip to that doctor to scare my ovary into making me a baby! But I am TERRIFIED something is going to happen to this baby. I had blood work last week that came to 40, then 48 hours later it went to 158. Doc called today and told me to relax and everything looks great, we have weekly appointments scheduled and more blood work Thursday. I’m so scared to get excited about this baby. I just need some advice to calm down and enjoy my rainbow.