@Apples1234 Sorry, meant to reply to this earlier. Have you tried different FET protocols? I did two programmed FETs with PGD normal embryos that didn't work (estrogen and progesterone tablets with a transfer on day 20). So my doc switched me to a stimulated protocol, jabbing puregon and an Ovidrel trigger when the follicle(s) are ripe to create an ovulation then FET on DPO5. I got my BFP with the stimulated cycle.
Yeah, I'd stay on the immune meds in case they help.