Hi Oana,
I am sorry for your losses. It's quite sad.
I would like to see the DNA reports of both, but especially your husband. I need to know exactly what his alpha status is based on. Normally, the combination of beta and alpha will lead to a mild condition, so we need to know if this is the normal case of alpha thal HbH disease or if your husband carries a triplicated alpha gene. This makes a huge difference, so the information is absolutely necessary before I can further advise whether you should continue to try to have children. If he is truly HbH and does not carry a triplicated gene, then there are steps they may help you have a successful pregnancy. It is also essential that you know 100% that you are not also an alpha carrier.