Your husband could be right! The trouble is, that once we get a problem of any kind, we keep focusing on it. And that makes it even worse. Once it's in your head, you can't forget it.
Get some mantras for yourself, and repeat, and repeat them throughout the day. You've got to re-educate your brain!
"I always sleep well, and wake up feeling refreshed."
"I love going to bed and sleep soundly."
Make yourself a specific time for going to bed. Think to yourself, "How lovely to get into bed, and relax."
Maybe half-an hour's reading, while you're drinking a hot, milky, drink ..? Or even a glass of wine ...? (Don't forget your mantras!) Then snuggle down and drift off.