35 hour work week instead of 40

I pay my own benefits. I’m wondering if I could ask my job to only work 35 hours a week. they’re very short staffed, and they give off to literally everyone. The people who have kids to take care of get to leave early everyday, leaving me to work over 11 hour shifts and to clean up after everyone with no breaks besides a 30 min lunch at like 11AM lol (and I work until 6-7pm). This has caused an immense back and neck pain, as well as ruined my mental health. I feel like my eating habits aren’t healthy, I think I might have an eating disorder so I’m used to starving myself but I literally can’t concentrate at the end of the day. I’m just wondering if this is something I could ask for considering I have my own benefits?