Delayed but PT TEST shows negative

My husband and I been trying to get preggy for almost 8 years now. I have been regular with my period for the last 8 months. I left coubtry for four months and returned last nov19, which was supposedly my ovulation day. My last period day was november 12. We've been sexually active and until now I dont have my period! Can you give me some common symptoms or tips when best to check if we are pregnant?

Merry christmas to you all!