Same sex relationship advice

Ok we are all female and we all know how hormones and shit works! So me and my girlfriend have been really butting head lately and it's been bad. It's mostly because we have two different anxieties, I'm sensitive as hell and she's mean as hell. And I don't know how to calm her down without her getting more mad/ mean and i know she doesn't mean anything she says so I also don't know how to be less sensitive.