Fertility appointment, I have questions!

Hey ladies, I've been having unprotected sex with my husband for three years. We have been actively TTC for a year now.

I've been so scared lately that there's something wrong. I've never been on the pill and I've had regular periods.

I've never even had a hint of a positive pregnancy test.

I have an obgyn appointment on the 21st of February regarding fertility. (husband is coming)

What questions do I need to ask or what should I expect??