job-problems..

Had a bad afternoon
Got yelled at by my supervisor and taking it really hard.
Her and another teacher who has ece units to also be a site supervisor are going to be observing the teacher and I tmorrow.. :/ we both got yelled at today by the boss ... 
I work for head start as an aide. 
I just want cry. 
I did a major violation that I felt pretty much could've lost my job. 
I feel like I don't even know if this is what I should be doing in life.
I just really need to stop complaining and do something ...
Just really upset :/ 
Sorry rant over.