The Point of No Return

Whoever came up with that phrase is a genius, I must imagine.

I guess it can be used to describe a moment in time or a point in life where you can only move forward, sort of like a denouement in a story where everything that has been happening converge before reaching a spectacular climax, where you can no longer turn back and must continue forward.

There are plenty of these "points" on the roads: narrow one-way streets that force you to continue straight ahead with no chance of making a U-turn any time soon if you happen to be lost and want to reverse-engineer your way back to somewhere you're familiar with. 'Course, these roads aren't always narrow (take the highway for example), but they always force you to look dead ahead and give you no choice but to go on in that direction.

Similarly in life, the weary traveller arrives at these points of no return every once in a while, following a series of life-altering experiences from which he must learn in order to move on, thinking that life's a downright b***h and griping about this and that while being forced in one direction. At this point, he would remember the roads he could have taken, all those miles ago, and dream of what could have been.
If he choose to think like that, anyway.
One could also refuse to entertain such thoughts, and instead look at the valuable lessons one has learned going down this road and reaching this point of no return, treasuring them and promising to learn from them, and let the river of life take his boat to wherever it may lead, or at least until another crossroads where life once again offers a choice.

Going on and on about this, I can most definitely say I'm at the point of no return, and I have to face that reality. I put myself in the IB programme thinking that somehow, I could return to the person I once was, two years ago at my old boarding school: the active, all-round, intelligent (to a degree), hard-working me. But now I have come to realise that that person is no longer me - I have let myself go, and now must work with what I am now; and this person that I have become cannot cope with the IB.

Of course, I still have a decision to make: either stay in the programme, face whatever that may come and accept the outcome; or quit the programme now and take a course that I'd actually like so that I'll stick with it (my parents insist on me getting a uni degree). Factoring in the fact that the IB is the second time I've been in a pre-U programme, I've yet to complete a Pre-U whereas all my secondary school classmates are already doing their first year in university, and I'm already 20...
I really don't know what to do.

Is this programme, this road, right for me in the first place? Have I taken this path for nothing? Which choice is the right one? What does God expect of me at this point? What was His will and have I failed Him? Have I failed myself?

"Do the right thing, come what may."
Which is the right thing?