Been TTC for about 3/4ish years ..

So, unfortunately I’ve never been to a doctor about it because I’m super panicked, which I know is terrible. I actually haven’t even signed up to a doctor in my new area since I moved here about 3/4ish years ago… however, I’m wanting to go to the doctor in January, been psyching myself up to finally just do it in January. But again, im super scared and uneasy about going and I’ve always been someone that’s had trouble going to the doctors about anything… so? What is it that I say? I really don’t want to explain it all to the receptionist😫 also, does anyone recommend those like TTC vitamins from like pregnacare and all that? There’s loads of different ones but I don’t know if they’re a scam or what? Any advice about them and what to actually say to the doctor would be super appreciated. Thank you