Had mine beg November. It was fine and nothing to worry about. We were similar to you - already had blood tests and SA via GP. Doc took histories, did an internal - bit like a smear, plus internal exam where he pressed from inside whilst pressing on tummy - to feel ovaries and uterus I think. Referred me for hsg and scan, and I go back once they are done.
My advice is;
-Write all your questions down so you don't forget anything once you're in there.
-Ask doc lots of questions, if you're not sure about something, ask away until you understand
-Take any temp charts along with you.
-Make sure you get timescales for treatment. We were told 3 months to get it all done and go back, but I can't even get in for the tests until 3 months after 1st appt