Another negative

I’m 31 and my fiancé and I have been ttc for 10 months now , I’m regular on my period and every time I’m 1 or 2 days late I test but this time I waited 6 days and I thought that maybe just maybe this was going to be our month , took pregnancy test this morning and it was a very sad to see a light negative 😔, anyone gone to a fertility doctor ? My gyno said if In three months using this app ( this is the third one) I didn’t get pregnant she would refer me to one , Im thinking there’s something wrong with me ..