Any Mothers, Nurses, Midwives out there-

I hate to be posting this but I am in need of help!! I am getting so tired I am starting to lose my mind.. I feel how tired I am getting and it is starting to affect all aspects of my life,quit smoking now, and this quit.. I just do not have the energy to dig my heels in.. I am back to taking it one day at a time but even a day is feeling like a week these days..My wonderful beautiful son is on a sleep schedule that is starting to take its toll on his mother.. He has never been a good sleeper, but I started the 5 min of crying to 10 min back in Nov and it worked sort of.. I have him sleeping through the night but he goes to bed between 6:30 and 7:00 and wakes up between 4:00am and 5:00 am.. If I try to push his bedtime later he gets over tired and goes back to waking up evey 2 hours.. and I do not think I can handle all this much longer.. My daughter will not nap so a day nap it out. I tired to have her have quiet time for an hour, did not work, she won't stay in her room and we tired a video so mommy could sleep. she wakes me up so I do not miss the movie!! She is so cute..LOL Any way I was spoiled with her she slept 12 hours a night by 4 months.. I took him to the doctor and he said In the next few months he will probably make the shift, where I can push up bed time and get more sleep in the morning.. The important thing is he has started to sleep for 8 hours... that is a big step.. I broke down crying and he was great, but he did say I have been through a lot this past year (Health issues) and he is surprised I have held out this long.. he even said probably not the best time to quit smoking, but you cannot go back now,smoking cessation, you have to find a way to get more strength.. He told me he already hears improvements in my chest.. YEAH!!But I have to say I am losing my "GRIT" not just about the quit, but just about getting through the day.. I am just so tired.. Smoking won't change anything I know that but I just feel so drained and tired, something has to give... If any of you have any suggestions on how to get my beautiful son to sleep longer I am open to anything except drugging him although the thought has crossed my mind LOL See I am trying to stay positive.. HELP!!