Complaining about my job and how they suck.

I'm a CNA, I've been at the same facility for almost a year now and when I say they suck Im not even kidding. Tonight while running to make sure a patient didn't fall I felt a sharp pop in my calf. I had partially torn my Achilles tendon. At the time I had no clue what I'd done just that I couldn't put weight on my foot and anytime I did I thought I was going to pass out. I had to fight with them just to be able to go to the ER, before going I got to hear how i WILL be drug tested about 100 times (I'll take a drug test any day, not something I'm worried about) also my admin before I left said well I heard you weren't happy with the assignment you have (I wasnt happy with it, I've been working the hardest hall on my side of the building for almost 2 months straight). The tone in which she said it to me was as if I'm faking an injury to get out of work. She also again brought up I would be drug tested after that comment. I'm furious that I had to fight them just to get check out to make sure it wasnt serious. I'm not the person that calls out regularly, I'm always on time, do my job well. I'm very frustrated with how I was treated tonight. Not a single person cared that I had injured myself (besides one but shes not only a coworker shes a friend that I got lucky enough to work with). Infact as I sat there almost in tears from the pain I had a girl ask me to watch her damn hall... basically as soon as I'm cleared to walk again its job hunting time.