read past posts, maybe plug Immune issues into the Search box, and also talk with one of the good doc's who handle these issues. The docs may have changed since I did this kind of testing. My original testing was with Dr. Sher and Dr. Beers/Dr. KwaKam. I believe, sadly, Dr. Beers passed away several years ago.
For me I had thyroid issues, I am on Synthroid. I had repeat m/c, and Homozygous for MTHFR, so I am on Baby Asprin, Folgard, and Heparin. I have high Killer cells and Dr. Sher told me I would never hold a baby in my arms if I did not do IVIG. I just was adamant, for me, that was where I drew the line. I was not doing it. It has helped many, this was just how I felt after already putting so many diff things in my body. For me, the Heparin and Baby Asprin seemed to do the trick. I implemented those too when I went to DE, so who really knows if the issues were cleared up or if DE is what did the trick.
Again, no clear cut answers. Unfortunately, some of it is trial and error. But I would suggest you find out what all you can be/need to be tested for and test. It will give you peace of mind to know you left no stone unturned. Definitely, now, see if you have any thyroid issues. You will want that under control in order to get and stay pregnant.