Feeling low and don’t no why I can’t get pregnant.

I have now been trying for 13 months for a baby and had 1 miscarriage.

I have tried everything. Ovulation tests, no alcohol, healthy diet, lost 17lb in weight and continuing. What else can I do?

I found out my prolactin is high but gp not concerned. I have had bloods & partner provided sample, no problems shown. I am really loosing hope 😭 any suggestions welcome 🙏