Need some reassurance- losing it

Hi there, I'm new here so quick bit of background. I'm a 39 year old female whos had issues with sleep-maintenance insomnia for most of my adult life but it's getting bad.
I now go to bed about 11-11:30 and fall asleep fairly quickly but I sleep very lightly and anything can wake me up. That's when the real issue starts as I can't get back to sleep even though I'm so tired I'm yawning. If nothing wakes me up (bedroom is dark and cozy) then I just seem to *pop* awake at about 3-3:15 AM and there's nothing that will put me back to sleep.
It's starting to damage my marriage, he doesn't understand why I'm so edgy and anxious and it's because I feel exhausted and on the verge of tears 24/7. He tries his best to be kind but laying there listening to him snore and sleep so nicely almost makes me resent him! I sometimes lay there and just wish I was dead so I could rest.
I've tried everything from prescription sleeping pills, to pot, to melatonin and exercise but since I can fall asleep, just not stay asleep, nothing works. My doctor is rather useless.
I really don't expect help with it, but am hoping for some reassurance I will make it through this. I don't know anyone who has insomnia issues so I can't talk to anyone who understands!

This post caught my attention with how remarkably similar our sleeping patterns are, though I see it is a few weeks old. I'm going to assume your problem hasn't went away in that time.

I go to bed about 12, falling asleep shortly after. I have woken up at roughly 3am for the past four years and remained unable to return to sleep. Sleeping pills never worked, though pot increased my sleep time by an hour for a brief period at the end of last year. I found drinking a bottle of wine also induced a good four to five hours sleep, though exhaustion was still present the next day.

Have you considered that your insomnia may be the side effect of depression? It could be that your edgy and anxious moods and the fact that you feel like crying most days is not just because of your exhaustion, but also because of underlying depression – aggravated by the fact that you feel your doctor is useless. If you drink coffee or any other caffeinated drink, even if only in the mornings to cope with your exhaustion – cut them all out entirely.

I tend to nap briefly during the day whenever I feel particularly exhausted, though I’m aware some people simply do not have the free time to do the same. My advice to you would be to look into getting another doctor. If that doesn’t help, get another one. Look into sleep therapy, explore the possibility that there may be an underlying emotional issue that is disturbing your sleep.