Advice ✌️

I am 43 years old, 1 son aged 17 and a new partner ... When we decided to have a baby I got pregnant right away, after 2 months of searching, but unfortunately it was a clear egg .... Second attempt after 3 months again pregnant, we see the heart beating but at 9 weeks it stops and after a year of trying I get pregnant again ... Also this time it stops at 5 weeks, despite Progesterone injections, cardio aspirin and absolute rest ... Now it is again a year we try but I'm not pregnant ... Exams are fine ... Who has had a similar experience and then managed to make it? What therapies?