When did you stop sanitizing bottles and BF/Pumping?

LO is almost 5 months. I just finished pumping milk (LO doesn't latch) and just feel like I'm done with it and sanitizing bottles. I'm still 30lbs over my pre pregnancy weight and I'm just not feeling good about it. I know how to diet to loose the weight (I've lost 50 lbs before) but just not while I'm pumping milk. I know how my body works and would need to eat at a deficit and probably stop supplying milk because it wouldn't be nutritious anymore. I know she needs a healthy mom, but I'm also shaming myself for considering quitting because I know I have a good supply. We were playing in front of a mirror today, and I hated looking at my puggy face and the new rolls on my sides. I miss the gym and the freedom I felt of existing in a smaller body.

I just need some reassurance on if it's okay for me to stop and supplement. I'm I being too impatient?

Also, when is it okay to stop sanitizing bottles? I'm just feeling run down and if there is anything I'm doing as extra that isn't necessary, I need someone to tell me. Will stopping strength her immune system, or is it not safe for me to do that yet?