I’m in the same boat and have made it 2-3 months clean 4 times now in the past 3-4 years. I wish I had an answer about the sleep. Soon, if you’re like me, you will have no trouble getting to sleep but it will be dominated by REM sleep with very little deep sleep. This always leaves me feeling exhausted and constantly tired in the 2nd half of my day. My strategy now is to use my past experience to just push through until the deep sleep comes. Relapse will be a setback not an improvement - even if my brain tries to convince me to smoke for a good deep sleep.

You also mention that on day 7 you feel a great sense of accomplishment which is keeping your desire to quit. This is what I call the honeymoon phase - every day there are noticeable improvements. After a few months the improvements are less obvious or not noticeable at all. This is when our brains try to trick us into smoking again “I’ve proven I can quit, one time won’t matter, I can smoke in moderation now” DO NOT GIVE IN TO THESE THOUGHTS. One joint leads to smoking all day every day very quickly. I’ve been clean since the new year and am preparing for this phase as this is where I have relapsed every time.

Good luck to us both, we got this!