trying to conceive at 45

Can anyone give me advice ? Me m my Fiancé have been having sex we ruddy since the last day of my period feb 20th and I've been super anxious nervous the last few days . Now it's been sex only every other day since this past Thursday . I'm still not sure for my period for another 10 days and I've been super tired n moody . I'm just afraid of another bfn.. How hard is it really to conceive covering my age? I mean , sex everyday through my fertile window n now every other day ? I don't how we can miss