So scared

So I am getting so terrified for my ultrasound Monday and need someone to tell me how to stay calm! I have had 3 miscarriages this year and am soooo scared we won’t see a heartbeat at our ultrasound on Monday at 6 weeks, 5 days pregnant. How do I stay calm and try not to worry? We had all the tests done after the 3 miscarriages and everything came back completely normal so they said it basically looks like they were all just bad luck. Is the bad luck over? I’m currently on progesterone, baby aspirin and folgard to help and make this one stick. My hcg went up like it was supposed to but was still on the lower side the whole time. I just want to see a heartbeat and am so scared. How do I stay calm? Any and all prayers would be greatly appreciated!! I just know I can’t handle another miscarriage. My husband and I want and need this baby sooo badly!