It's more "Oh thank you God" than joy

This is my 4th pregnancy since April. the first three were miscarriages. I will be 8 weeks on Monday. I'm finding that this is the most stressful event I've ever endured. I am constantly thinking I'm going to MC. I've had two ultrasounds and little bean is as snug as a bug but I still worry. I had myself so worked up the morning of my ultrasound this week because my symptoms were nearly gone for the 2nd day in a row and I thought for sure there would be no heartbeat. But at the ultrasound there it was heartbeat of 135. My first hought "oh thank you God" and then tears of happiness. My first ultrasound my first thought was "oh thank you God" and then tears of happiness. Every time a symptom leaves, I panic. When it comes back, "oh thank you God". I didn't have morning sickness today and my boobs don't hurt as bad!! I get so worried a MC is going to happen. Next day or later that day...."oh thank you God" I'm sick again!!! Don't get me wrong, I am more than happy that my little bean is sticking, I just wish I could enjoy it more and be less "oh thank you God". I hope that day comes sooner than later. This is why I would say that pregnancy after MC is full of more "Oh thank you God's" instead of more joy.