By the way you're describing yourself, I'd say it probably wouldn't hurt to talk to your doctor about whether you might be experiencing some depression.
On the other hand, it is not unreasonable to not be totally back to your pre-pregnancy self by 8.5 months. Hormones may still be a factor.
My son was born 4 years ago, and my sleep has never been the same since. I was what I would have described as an easy/good sleeper. I had no problems falling asleep or staying asleep, enjoyed sleeping in, and the occasional nap! lol But after baby, I am amazed at how little sleep I get and function on. I had no idea the level of sleep deprivation I'd experience initially - and for me it lasted for a LONG time! My son didn't sleep through the night until he was over 18 months old, and he would get up anywhere from 2 to 5 times a night. I, too, would be craving sleep in the mornings and afternoons, because I was exhausted! I found it really hard to learn to sleep when my son was napping, but when I got that figured out (which was probably not until he was 2 or so), that definitely helped me get some much needed rest. I think a number of things affect the way we sleep before vs. after baby - hormones, worry, difficulty falling back asleep after waking up multiple times a night, habit, and like another poster suggested, the internal baby monitor... But i'd say not to bother comparing yourself to your husband. He did not experience all the hormonal changes you have, and men are just different in every way than women. My SO falls asleep the minute his head hits the pillow - literally. I can lay there and obsess about a million things, watching the hours tick away... well, I'm sure you can relate.
But for the worrying about your body thing, I think that is a really natural thing after having a first baby too. In fact, I posted something similar about my overwhelming fears after having my son. I never dreamed how suddenly, I'd be paralyzed with fear that I'd get sick and die, leaving my son without a mother. Every little health problem caused me overwhelming anxiety. I obsessed about things happening to me or my son to the point of playing out scenarios that "might" happen in my mind, and thinking of what I'd do in that scenario. Not healthy! But to an extent, I think it's totally normal. When I posted my question about that, I got a ton of really supportive responses from mom's who could totally relate to what I was going through, and they assured me how normal it was that I was feeling that way. They also gave me some really helpful suggestions for how to combat that type of obsessing. If you look through my posted questions, you can read all my responses.
Basically, I just wanted to tell you that you are not alone, and I don't necessarily think what you are going through is unusual. However, if you think it's interfering with your life, or your enjoyment of your life, it never hurts to talk to a professional, especially if you have something chemical going on that might be contributing to a little depression.
Best wishes to you. Please feel free to message me if you'd like to chat. :)