I would def recommend getting a work up for immune/nk cell issues. Just to be on the safe side.
My immune specialist says I have antinuclear antibodies, according to the book, is your body baby friendly, this is easiest described as when I get pregnant/have a transfer my body has an immune reaction (like when you cut yourself and it gets all read and inflamed). I also have slightly elevated natural killer cells in my blood and uterus. When we get pregnant our T cells camouflage the presence of the baby (as it is half you and half your partner/donor). In my case I have more nk cells than T cells (or they are more dominant) which means it looks at the embryo and sees it as a foreign body and kills it. This can happen before implantation or after.
So it would have been a struggle for me to get pregnant naturally/on ivf anyway. I wish I had done the testing earlier.
Obviously what I have described above is paraphrasing and simplifying it, but that's the easiest way I can describe it.
Not all FS believe in its affect on pregnancies though.
I hear you all on not watching shows and friends who complain about their kids although in my case not everyone knows that I am trying. I just find it too difficult to tell them about the BFN's, especially a friend who has had 2 children in recent years using IVF