Fighting doctors

Hi all. I’m new to this—just diagnosed heterozygous mthfr today. I’ve had two miscarriages in 6 months, so they found out during a blood panel for recurring pregnancy loss. I had to request several times to get the mthfr test, and even then, I think they only did the c77t part. Is there another test I should get to see if I’m complex heterozygous? Thanks! Just trying to figure some things out before I get pregnant again.