Everything could go to hell

I started a working sercuity for a company and on my first day the fucking manager was mixed up and I showed up an hour and a half early. On top of that I had more then one person complain or confront me because apparently I treat work like an option. This upset me and my first month I had no days off and worked 12 hour shifts for a full month. My grandpa was put in long term care and had surgeries. My uncle passed away. This has been hard and running into former co workers never made my life any easier. Last week I was asked to work both 12 hour night and day shift and I ended up becoming stressed out and didn't show up to the day shift and didn't call. Last night I didn't sleep very well and today I was late. I wish I could be get rehired at a company that I worked for in the past and this job and career path could go to hell because it was a nightmare. Also I got offered two fucking months of 12 hour shifts. I want to cry or get fucking fired