Repeated Miscarriages

Hi,
My husband and I have been trying to conceive for 2 years now and have had 6 miscarriages within that time, all being early miscarriages except for our little girl who stopped growing at 13 weeks due to triploidy. We have had various tests done and have found out that we are a partial HLA-DQ match, I have suspected endo, PCOS, and elevated NK cells. I just read your information about the immune system and the effect it has on trying to conceive. I am currently taking low dose naltrexone, metformin, and synthroid. My doctor has recently prescribed me plaquenil. I’m wondering if there is more I should be looking into pr treatment options that would be better suited to us? I am in Canada so IVIG is extremely hard to do here.