I would like your advice on what I should do.
Don't give up.
I've had a series of tests done, from every specialist I've gone to.
That's really tough.
I am so sorry for your losses. I have also had many losses, mine were from IVF pregnancies- 5w, 7w, 9-10w, and 16w. Our 16w loss was chromosomally abnormal (others not tested). My tests come back normal. We have male factor infertility and I always thought that was a factor in the losses. Well, we just found out it is. There is a new test using hyaluronan they can do on sperm to see if they are chromosomally normal, and we just found out only 60% of my DH's motile sperm that looks normal (and would be selected for ICSI) is chromosomally normal. My RE now thinks that this may be a factor in my losses and the T21 pregnancy. However they are going to use the same procedure in the test to pick out the normal sperm for ICSI.
Anyway, I think that chromosomal abnormalities in men's sperm are mainly found when there is a history of male factor, but it makes me wonder of your DH has ever had a sperm analysis?