Feeling sad

Ta
Been ttc for 15 months now and nothing! every month I get a bfn and get rly upset. I'm 11 dpo and my temp dropped! So bloody AF is on her way yet again. 
I did so well this month not caving in and testing! Feeling rly sad this morning. I don't think I can literally do anything else! I do bbt, opk. I did cbfm this month. I drink fertilitea!  Using pre seed. I just don't know what else I can possibly do. 
​I wanted to stop tracking next month but hubby wants me to keep doing it. I don't know what to do.