How long have you ladies been TTC-ing ?

I am 25 years old and this is my 7th month of TTC.  At what point should I get myself tested ? Most of my friends doesn't have this problem, they all got pregnant really quick somehow and I feel very alone and I don't know what to do. My husband doesnt have any problem with his sperms, he already took the test at the hospital, so the problem must be me then ?? I wanted to go to the fertility centre but my husband told me to wait but should I wait on this matter ?