Depressed.

I'm depressed/annoyed/tired and anything and everything that could possibly go with those words. I'm now currently 13 days late. 50 days since my last period. 2 negative tests. I've got so excited over the last week, even through the BFNs, and now I'm just done. Wouldn't I know by now? I'm tired of being lead on by Mother Nature! Can anyone please give me advice besides telling me to go to the doctor..? Anything will help.