The biggest question to be answered is will your parents be supportive of you returning to the nest? If that answer is yes, then I would say do it. If that answer is I don't know, then you need a REAL conversation with them about it.
It sounds like things are kind of falling apart or you may just be catastrophizing? Can you do something to avoid being dismissed from school? Are you certain you are about to lose your job? Either of those two issues could lead you to depression and are you able to seek medical treatment for that?
There is no shame in returning home. Really there isn't. Most parents only want the best for their kids and will do almost anything to help them become successful and self sufficient. Some kids just take a little longer than others. Big hug for you.