Delusionally Rational?

I'm at a point where there is no optimal path. I'm about to fail my classes this semester (4 months down the drain and 10k) but I'm also at a critical point of development in my startup idea. I have 3 weeks left to lock-in and QB-sneak, clutching my class grades - very unlikely - or I can spend the rest of my 3 weeks all on my startup - seeing where it goes. Risk-Reward is skewed towards cutting my losses and going all-in on the startup. It's a shitty position to be in. I put myself here. Yet here we are.

I believe I'm making the most rational decision, yet it feels crazy to think that this is the best choice.