Anxiety/Depression

Ok so I’ve been going through a rough time with my family and its been rough my whole life because we’re not the most wealthy but right now it’s even worse and I’ve been getting more anxious and depressed I had an anxiety attack when I was at school and locked myself in the bathroom and got in trouble for being away so long I also have Bipolar disorder and a 2 year old sister to take care of cause my older brothers usually aren’t home and right now it’s just been getting more depressing and with my bipolar disorder I feel like one day I’m just gunna slip under the surface and never come back up. Does anyone have advice that could be helpful to stay calm cause I have anger issues and I get bullied.