Gynic related. Please answer my quiries.

Hello Doctor! Actually we are trying for a baby and since three months we have been trying but unable to get pregnant..everymonth getting my periods time to time..I usually have a 28-30 day cycle in the second week from 9th day till 13 ...14. Day we had intercourse..all months.but I don't know what's the exact reason it's been five years that we got married..so it's high time for us now from all angles...actually I have thyroid problem hypo it's some 12..13 but from one and half month am using medication but still unsuccessfull...do we both need to get tested or only myself please Answer my quiries...before one year I conceived but unfortunately it resulted in blighted ovum due to corona period did not dare to plan for pregnancy all these months ..we are trying from only past three months...please also mention tips and suggestions to make this happen fast...after pregnancy failure last year I have undergone d and c and had scans three times and everything was fine inside ,...