can't get it up! 😡

So for the past 3 nights my husband has been "tired" and can't get it up. This has never happened before and it just really bring my self esteem down I feel like it has to do with me. 
I guess I should add that he goes straight to bed right after our fail attempts to sex. We have a demanding family business and to be fair I really don't think it has to do with infedility 
UPDATE: so I took the advice given by you ladies and I let him rest and didn't mentioned my concerns to him and today all day he kept rubbing against me and playing with my breast kissing my ear and neck and just making me feel wanted. After we put our daughter in bed her carried me to our bedroom and said guess who's back and we'll the rest was amazing 😍