K.,
I experienced this also about when my daughter was about the same age. First, you have to do whatever is most relaxing for him...create favorable sleeping conditions...as long as you want him to sleep...ie- darken the room, white noise, or light music etc... Whne he does wake, you wake with him and tell him EVERYONE ELSE IN THE WORLD IS ASLEEP, AND THAT HE NEEDS TO GO BACK TO SLEEP. If he still resists, you can bargain with him....tell him after a 5 minute story, then it will be time to go back to sleep...but no active time, running, loudness....keep in sleepy mode, even tip toe an dwhisper not to wake the house and neighbors (really not waken his spirits- which as you know...are impossible to get back to sleep). A story helps them keep their sleepy imagination in tact, so they have something to ponder on and sleep....dreaming of similar situations....and perhaps you rubbing his back ever so lightly, in order to being able to stop witout detection. I had my daughter keep her eyes closed during the last half of the story, to avoid any stimulous, and therefore easy to take back to bed. I really think with some practice, you might find that helpful. You will need to take advantage of his nap time whenever possible, joining in the sleep time! After all, you say that it mkes you feel as your mothering is suffering.
With the phases, and lack of sleep, I went to the Dr. upset because I felt like my mothering too was suffering, and it broke my heart and disappointed me severly. My Dr. decided to put me on LEXAPRO, and anti-depressant and
anti-anxiety...which was God sent for me! I was/am much more patient and my daughter sensed it. The length of time on the meds depends on you.
Either way, I think keeping on the "sleepy mode" will help your son stay in that mode too. Quiteness, no excitment and lots of whispering!
Good luck to you and may you find plenty of rest!! :)