Just as a foreword, I should mention a couple things about my current situation. I technically live with my mother, as we both share a house, but the basement of our house was built separate, with its own kitchen and etc - so I pay my own rent for the entire basement of the house. This was the best living arrangement we could both afford as I had a child young (my son is turning 6 - I'm 24) and this allowed me to have access to a separate place of my own while still being in constant contact with my mother, who has graciously helped me out (physically) over the years while I go to college and etc. While I understand some people may not agree with our living arrangement, or have other "views" on what should have been done when I had a son so young, I would please ask those folks to not use this opportunity to insult me or the way I live my life currently. We can't all live in a perfect world where everything goes right 100% of the time.
Firstly I'm just going to point this this out :To be politically correct and technically accurate this makes her your landlady and your her tenant and your basement your own paid-for property.You wouldn't be remiss in being firm in keeping your own hours or how you keep them in your own place.

Secondly I don't have advice to add here but only an "angle" to share, I'm not sure how you feel about being sneaky , "Oh AP? that stuff doesn't work , I gave up on it , God! what a phase , you were right mom , what a waste of time"

She has also made a point of "coming to check on me" during the night, between 3 and 6 AM
it's amazing how she herself keeps herself awake int the very late hours of night to "check-up" on you (one would think you're selling drugs out of your basement not meditating judging from her response ) but mothers can be very* tenacious , ignore her interruptions the first few times , till she finally gets it and it stops , and if she brings it up again or keeps at it , there are other angles too "I have a child to take care of , I have college work that needs getting done , I have rent to worry for , I wish I was a robot who could answer you at your beck and call but I'm not, I'll get all the work done that you need me to do but not when I'm resting , it's only natural I sleep and rest , Ok mom?.