Melatonin While Pregnant

So I’m about 3-4 weeks pregnant. Confirmed by like 10 pee tests and 1 blood test. My hcG levels on the blood test were 179. Anyways, I called my OBGYN which I can’t get into an appointment until April just to clear all my medications and they said not to take my melatonin. So I googled it and this one girl miscarried after stopping her melatonin and now I’m terrified that’s gonna happen to me. Please help ease my mind. And is 179 a good level? This is my first pregnancy after a chemical last year. I’m so nervous.