Feeling Really Hopeless

Like a lot of people, COVID has definitely worsened any mental health issues I was dealing with. I'm in community college cause I dropped out of high school due to issues with my health, family & bullying. Even when my current college is triggering or a haphazard mess, which is all the time, being stuck at home is worse. There's just so much time to think. I live with my mom, whose new therapist thinks she has PTSD. Whatever condition she has, it's been very hard living with her. She's in a bad mood all the time, always coming across as hostile but never just owning it. I know I'm not the easiest person to live with but when I am a jerk I at least admit it. Her whole attitude is honestly pretty reminiscent of my dad when he would get drunk all the time. I've also been working with a math tutor so I can take the ACT exam, as I haven't taken a math class in 4 years. It's really done away with any progress I've made. I've completed ten courses in college so far and have gotten all As but whenever I'm in a tutoring session I get so nervous, partially cause it reminds me of high school, and do terrible as a result then feel like an idiot. I just don't know how to keep living like this.