My body frustrates me

Okay so I posted a while back how I had a faint positive and tested a few more times after that all negative. Well here I am in November with no sign of aunt flow. I mean I know my period is irregular but this is becoming too much. I know I have to see a doctor, but I'm wondering if I should just go to a fertility clinic and see if my husband and I are okay to have kids before we continue this heart wrenching journey. Thoughts ladies?