Great experiment bro! Maybe your next experiment will be on how going to bed a bit earlier effects the outcome. After that you could try testing caffeine. If all else fails you can ask your lecturer to be a little more interesting.

Well that didn't go as planned.

When ever i have to pee during long drives it makes me tired for some reason

Jeez... I wont lie, I probably would have thought that'd work too. But wouldn't put it to the test.

Try this method before you go to bed and report back!

Maybe its time to figure out why you fall asleep in class? So sorry this happened to you OP

Tomorrow try stifling a good shit. Maybe that will work.

Your body is supposed to wake you up to eliminate when it feels the urge past bedwetting age. That's not normal, go see a doc.

This actually suggests that you've got some sort of medical issue. I'd try to see a doctor ASAP, since I can't imagine that you want to suffer from this issue for longer than you have to.

Have you tried caffeine tablets? I use Pro Plus. With my hypothyroidism and having to take heavy pain medications for my severe nerve damage, I feel tired/sleepy often, even when I get decent sleep, so I can fully sympathise and empathise with you on the sleeping part, can't say I've ever peed myself in class though. Maybe caffeine tablets, like Pro Plus, or some strong caffeinated drink before classes? I'd also recommend seeing a general practitioner (doctor) to see if there is an underlying medical problem.