Struggling with life

I'm really struggling. I feel like I just can't do it all anymore. I need a long break to just be and find out what I really want to do with my life. I hate my job and I become so anxious about it. I feel like my boss hates me. I look for new jobs constantly but my self esteem is so low I don't feel I would be able to do it. I just want to work part time to ease some of the pressure. I've also been sick a lot lately and my kids have been sick too. I spend any days off I have stressing about work and upsetting people. The worst part is I feel like I stuff up because I'm so anxious. This is affecting my whole life, I'm angry at my family because I'm so stressed. I have been seeing a life coach but I feel I need more as she encourages me not to quit which I understand however I have other health issues and I feel like this job is killing me because I stress myself so much and feel like I always have to choose work over my family. I don't even know what my question is. I guess has anyone felt like this? What did you do? I just crumble under pressure and I feel like a failure. I feel like I'm the problem. I do suffer from anxiety and depression which I talk to my dr about and am organising psychologist appointment. I feel like I have put this off previously because I'm too scared to ask for time in lieu for appointments which is why I started seeing the life coach. Has anyone taken time out from work for a year? Did it work out? It's to the point that I have been saving to cover costs if I quit.