Hello Molsykins,
Firstly, I am sorry to hear about your husband and I hope he is recovering well. It is good that they were able to freeze sperm, so you can try for siblings.
Secondly, I am not downing what your clinic said, but sometimes different clinics have different levels of acceptance. With FSH my clinic like it to be under 10, but I have heard of some who like it to be under 15. Yours are obviously just very cautious liking it to be under 7. I am not an expert, but I would say your FSH is fine just now, besides it isn't really accurate to judge it on one test alone. Your AMH does put you in the low fertility bracket, but just wanted to share that mine was 2 and I had an FSH of 13, which lowered to 10 on another test and a host of other issues, but my daughter has just turned 1, same age as your LO. So, don't give up hope - miracles do and can happen to you too!
Hope that helps and wishing you well on your journey. Keep us updated on your treatments. Xxx