I put myself in sort of a predicament and it's going to end with me upset

I had my second chemical mc 4 weeks ago, it was natural and at 5w. My doctor said no big deal that I've had two and just to wait two cycles. I figured this was just for dating purposes and tried again. I had blood work done because I thought I had strep throat, it came back that my thyroid is on it's way down so I think that may have caused my mc.

Well, everytime my bf and I have tried to get pregnant it happens right away but I'm hoping this time will be different. My doctor said he wants to check my thyroid in 3 months but I called an endocrynologist and I can't get in until August 24. I just know I'm going to mc if I'm pregnant again and I don't know how I can get on thyroid medicine anytime sooner. I called my ob and just asked about my thyroid they suggested I work with my primary doctor, that's it.

I'm going to keep calling my endocrynologist trying to get in earlier but they're so booked. I'm just so upset. I wish I would've waited.