First Fertility appointment

Hey ladies, have any of you visited a fertility clinic? I have irregular periods and it took us over 1yr to get pregnant (we werent trying but we werent preventing) which led to a mc in Jan.. i have now tried OPKS, balance pills to regulate my period, which have helped! Ive actually had my period every month after my mc and yet we have still not conceived!🥺and i have a fear im not ovulating! I have my first fertility appointment this Thursday so i just wanted to see if anyone can tell me what to expect and/or their experience?