What should I do??

I had a missed miscarriage at 15 weeks in March and since then my periods have been all over the place. I have always had irregular cycles, but since March my cycles have been as long as 42 days. I've talked to my doctor and he said that he's not concerned as long as my cycles stay shorter than 50 days.

Anyways, this is our 6th month ttc and I'm currently on CD 40 with no period, sore breast, dark areoles, cramping, crazy emotions, AND a whole bunch of BFNs.

Should I call my doctor and get a blood test? Or should I wait it out and see if AF shows up?

I'm so concerned that I am pregnant and my HCG levels aren't going up and I'll miscarry again.

Maybe I'm just overthinking the whole thing.

Any comments, ideas, or solutions welcome!