Oh hon....

I am sorry
The good news is I think you will get CH's for the 19th. Try putting in tomorrows temp around where it was today and see if you get them? I understand your frustration. I get tired of just doing it cause we have to. This month I am just going to try and BD every other day.
You did have a +OPK so I say really try to relax now. Give DH the night off and try again tomorrow. Some women have sex once during their fertile days and get pregnant. If it will make you feel better do a search on FF for charts like yours. It usually helps me feel a little better about my chances when I am feeling down.
Lots of