Pregnant & scared

Found out I'm 5 weeks pregnant. I've been on levothyroxine for a few months, had to get my dose bumped up since it wasn't in range, and now here I am. My primary doctor is wanting me to check in with an OB, and I'm on day 3 of phone tag with a nurse at an OB's office since my GYN stopped providing OB care. I know I gotta get in with an endocrinologist right away. I'll be a new patient, so who knows if I'll be able to get an appointment in a decent time. I'm terrified of hurting/losing my baby. Any advice/encouragement? I could really use it. I'm about to be 33, and this is my first pregnancy.