Just some quick thoughts:

I'd step back a bit and start by talking the issues over with counselors at your school (academic advisors as well as personal counselors) and your family. It sounds sorta like you want to hit the reset button due to discomfort about where you are right now.

The on and off immobility due to fear/discomfort at failure/potential failure is often a self fulfilling thing...I know all about that, even though I continue to resist dealing with it.

I can't state for the record this is part of it, but...you may also have an undiagnosed ADHD or similar condition that has helped to lead you to this particular set of crossroads.

On the other hand, this could be the thing that you need.

But first, work with those who can and should help you figure out what's going on in there...

-brendan