Mil boundaries and pp anxiety

i’m 23 weeks pp now and still trying to figure out how to set boundaries with my mil. she means well, but it’s like she thinks they’re just suggestions or something. i’ve been tracking my symptoms and anxiety on a chart and i’ve noticed it spikes whenever she comes over. i’m talking palpitations, sweating, the whole deal. does anyone else have to deal with this kind of thing? fwiw how do you handle it without feeling guilty or rude? i feel like i’m already spread so thin with the baby and toddler, and adding mil drama to the mix is just exhausting. anyone have any tips or advice?