Crinklestuck

Day 0

Today, a friend of mine - whose identity will not be disclosed in these journals for her sake - asked me for help with a small inconti inconvenience she has. By her description, she "wets the bed and no conventional cure was able to fix it", and so she turned her attention to magic - and me.
Sadly, I had no magical cure for nocturnal enuresis - but I already had several ideas on how to make one, and so, I gave my word to help. I sent her home with the promise of visiting her as soon as I am finished, and immediately began working.
After hours of calculation and speculation, I got a solution - and a list of possible side effects, most of which had a negligibly small chance of happening, but slight insomnia for two to five days and sudden loss of bladder control inbetween .3 and 2.6 hours stood out at 1.73% and 4.21%, respectively. Those side effects had to be tested - and what pony could have been a better test subject than myself? "The fewer ponies know about this, the better" was my reasoning.
Insomnia is something I am used to, but the latter worried me a little. Just to make sure I would not leave a puddle randomly somewhere in the castle for Spike to clean up, I made up my mind to arrange for protection. Not wanting to get Ra my friend's hopes up for nothing by visiting so soon, I decided to instead borrow some "absorbent underwear" from Pinkie Pie (she makes no secret about her having a stash of diapers in case she has to wear one for a party she plans for foals).
In an attempt to keep my friend's identity a secret from the motormouth party pony, I told her that I needed it for personal reasons, to which she responded by giving me a piece that was twice the size of my head, and whispered "have fun". I have no clue why she whispered that, but the important thing was that now I had a diaper and I wouldn't need an enlargement spell to make it fit.
With the diaper in my saddlebag I returned to my magic-science lab at the castle, struggled for 5.2 minutes with putting the garment on, then gave my newest spell a shot, targeting myself. I wouldn't need the direct effect of it - I have not had nocturnal enuresis since a year before the Nightmare Moon incident - but the side effects would affect me if they actually happened.
After the flash of light faded, I did not notice anything strange, which was good news. I decided to keep the diaper on in case side effect #1 happened, and went back to reading the book I was in when I got interrupted.
2.6 hours went by - actually, almost three - without an accident, so I determined the spell worked without that side effect, and attempted to remove the diaper.
I write attempted, because I failed. I spent the next five hours trying to take it off with my hooves, teeth, magic, a knife, a bigger knife, pleading, ordering... all of which ended up yielding no success. It got rather late by then, and Spike asked why I was shouting "I order you to get off my bum!" at a diaper (for some reason he didn't find the fact I was wearing one odd at all), so I concluded it was time to go to bed and try again after a good night's sleep with a well-rested mind.
I wrote down this journal to be able to track my progress, and will continue to do so until the situation is resolved. I am also denying myself from urinating in the thing, and hope I will not wake up wet in the morning.