Hubs doesn't want sex!!!

Help! I went to the dr for a check up and they did an ultrasound and found out for the first time in probably MONTHS I was ovulating this week! Surprise!!! So I told my husband to get ready for a fun week and after Monday, nothing!!!! No matter what I try he is not on the mood! To tired etc!!!! I can't help but be irritated but I don't want to fight over NOT having sex, that's not going to help!!!! And I feel like talking about it has makes it worst! But when else am I going to get this obvious of a green light!!!! HELP Prayers... Feeling really sad and upset and really rejected!