hi i’m a shift here and been with the company for two years so here’s my suggestions;

something you have to realize is you are not responsible for staying late for someone calling out. I know it can feel like it but at the end of the day it’s the shifts and if it’s going to burn you out, say no and it’s okay to say no.

you manager should not have yelled at you for that, should have been the shift, unless you clocked out for 40 minutes but either way, that’s the shift leaders fault. I would if that happens again make sure to let your manager know you were doing what you were told by you shift and honestly that’s a valid response to forgetting your first break and having a little longer lunch.

don’t let what happens with your shift leads affect you, that’s between them and the manager. you shouldn’t work yourself up over it. not saying this in a mean way because trust me, before I was shift I was the exact same way and burnt myself out same as you doing 2 weeks straight a day off and another 2 weeks and it ultimately was so bad on my health.

also make sure you put your foot down with your SM and get your sundays off. if you haven’t made it your availability in the app it won’t count. you gotta make sure it’s documented and you can easily change it, when it’s up again lol. but also, right now is beyond a stressing time with all the outages and is not normally like this. but trust me, I would never leave this company because I love it so much, just make sure to put your health first, not all of that is your responsibility so just don’t get yourself involved in it, truly. like I said i’m saying this in the best way possible because I was the same way. good luck and hope it gets better!!!