Nervous

I’m about 250 lbs and 5’8. My husband and I have been TTC for almost a year with no luck(no miscarriages or chemical pregnancies). He started his fertility testing, and I start mine next month. I’ve had regular periods for as long as I can remember, and last month I was 6 days late before AF decided to show her ugly face! Anyone know what I can expect from my doctor as far as fertility testing? Is there anything I should do to prepare for my appointment in a few weeks? Thank you! ❤️