First appointment to discuss fertility...

I have been ttc for 10 months and just had my second miscarriage. Both were early at 4.5 and 5 weeks. I just made an appointment for next month with an OBGYN to discuss my fertility and possible testing that could be done. I am terrified to have another miscarriage. I know it is very common, but if there is something off with me, I want to be proactive so I don’t have to go through another loss. Does anyone have any advice? Are there specific questions I should ask, or tests I should ask for?