A.C.
You'll probably get many replies from moms who share your complaint of being tired all the time. There can be a variety of reasons, being a new mom and all that involves being the main one, regardless of your baby sleeping through the night.
Have you had a comprehensive blood panel done to rule out thyroid problems, hormone problems, vitamin deficiencies, etc. Something as simple as B-12 could be helpful. Or your thyroid might have become sluggish.
What really caught my eye, however, is your complaint that you cannot seem to get enough sleep. There is a difference between being tired all the time and sleepy all the time.
If indeed you feel sleepy no matter how much sleep you are getting, you could very well be suffering from a sleep disorder. Sleep apnea is probably the most common, and you don't have to be an overweight man to fall victim to that. You would be totally unaware if you have sleep apnea, even though your body could be awakening a hundred times a night because you wouldn't be awakening enough to recall it. Ask your husband if you are snoring a lot and even if he is aware if you stop breathing momentarily when you are asleep.
Restless leg syndrome is also something that can keep you from getting quality sleep, so even though you put in a full 8 hours of sleep, it's not quality sleep.
Much more rare would be narcolepsy. Think back over the years since adolescence or so and see if you recall having trouble staying awake during the day. Most common times might be during a classroom situation, in church, at the movie theater, while driving, or just sitting reading a book.
I mention adolescence because this is generally the most common time that narcolepsy starts, though it wouldn't be unheard of for it to start in your twenties. Something most always triggers the onset, and childbirth could definitely trigger narcolepsy. So can the flu, strep throat, even an emotional upheaval in your life.
So, if you're simply tired all the time, there are a good many possibilities, and your PCP should be able to get to the bottom of it if indeed it is more than just the huge adjustment to caring for a new baby.
However, if it is sleep you crave, and you find yourself falling asleep at inopportune times, no matter how much sleep you get, you need to get checked out by a sleep specialist. Narcolepsy deprives the patient with the deep restorative sleep that is essential for the body to operate correctly. No amount of sleep will help because the brain zips right through the restorative sleep cycle, thus you feel forever sleepy. There are other symptoms of narcolepsy, but Excessive Daytime Sleepiness is the most common. That said, like I indicated, there are other sleep problems that can bring on Excessive Daytime Sleepiness.
If your PCP rules out all the obvious things, ask to be referred to a certified sleep specialist. Good luck
If you suspect narcolepsy, feel free to email me at ____@____.com.