Doctor concern? HELP! Ftm struggles 😭

Courtney🐧 • Mommy of one perfect little girl 💜
How often am I meant to go see my doctor throughout pregnancy for a routine ob? Before, I was going every 4 weeks, but I thought I was supposed to see her more often like every 2 weeks since I'm in my third trimester now? It's been 4 weeks since I've seen her, and she didn't have me make an appointment like I usually did beforehand. 
Should I call or wait for her to call me?