Pregnant and nervous!!

I am 4 weeks and 3 days pregnant. I can't stop peeing on test all the time making sure it's real. My hcg levels have been drawn 3 times and are increasing about 120-130% daily which my doc says is great. Now I'm done with blood draws and I have to wait 3 weeks for the first ultrasound and I'm worried! I just want everything to be okay and waiting 3 weeks with no draws or visits at this point make me nervous. I know this is the process but I need to feel proactive! I just want to see the heartbeat so that I know all is well, and I will in 3 weeks but the wait is gonna kill me! I thought the two week wait was bad.... Good luck to everyone!!!!