I Worry Too Much

So im about to put in my two weeks at my old job. Im so nervous that after i do this my boss will hate me and give me bad reviews if I use her as a reference. She wouldn't do that right? Has she been feigning niceness all this time? Plus if she doesn't give me this next Saturday off it might look like im quitting because I asked for a day off and didn't get but the thing is I RARELY ask for days off I gave her a two week notice and if she can't find someone to cover a shift in that time, I just think my boss isn't trying very hard enough but I couldn't tell her that, hahaha😅. Shouldn't that be enough time? more than enough.😤