I want sex until it’s actually time for it

Sometimes I’ll spend all day at work thinking about how I can’t wait to jump my husband’s bones as soon as we get home, and then as soon as its actually possible for us to have sex I suddenly just feel like I don’t want to anymore, I’m too tired, I’m hungry, I have a headache, I’m nauseous, I’d rather just watch TV... I give myself every excuse in the book!

Anyone else struggle with this? How do I keep myself in the mood enough to actually go through with it??