Not to be rude, but how exactly did you ask your professor for help? Many students would say that their professors were unhelpful but then when they would email me what they had sent was angry, unintelligble panic and not anything they could get help with.
Try something like,
“On homework problem 5 I’m having trouble with the way to figure out the linear differential equation. I’m not understanding how to divide (XYZ) into (XXY) in order to get (ABC)”
Here’s the Kahn Academy Link:
Differential Equations | Khan Academy
And finally, perhaps you can find some counseling through your college. It is very important you make good decisions, not ones in the heat of the moment. This extends far past college.