Crinklestuck

Day 2

During my restless sleep I have either wet the diaper again, or the wetness spread. I am inclined to think the latter, as during breakfast I had to relieve myself again. I feel like I am already used to doing that, and it is worrying me. Spike returned some time after I went to bed, because he was around when I ate; I tasked him with cleaning the spiderwebs off the castle's corridors while I returned to the lab.
I finished working on the new identifier, and I made sure to make it able to handle magic much (specifically, if my calculations are correct, approximately 1764.6%) stronger than the first one. And it still was not enough! Now I had to send Spike to Canterlot for supplies to build an even bigger one. I refuse to believe that my spell could have became this potent on its own due to my failure. There has to be some deeper mystery to this diaper.
Before leaving for the train with the bag of bits I gave him, Spike asked if he should ask Princess Celestia or Luna for help, but I refused. Of all ponies in Equestria, they were the two I wanted to hide my current state from the most, right before my parents and brother. I simply cannot let them see me like this.
With newfound enthusiasm, I delved into my books, trying to determine the exact enchantments on the diaper. Obviously there was some sort of material-strengthening to prevent me from pulling the tapes off and to tighten the grip they had on my flanks. I found references to magic effects like that in several books, the most promising being one detailing spells used at mental hospitals: apparently straitjackets used to confine unicorns had similar enchantments. The vibrating reaction to anti-magic was akin to a warning spell used by the Celestial and Lunar guard unicorns, to notify them if somepony tried to nullify their powers. To my dismay, neither had a listed counterspell, so I kept reading with hopes of finding them.
Between two books I grabbed a few bites for lunch. Later on, a growing cramp in my stomach gave me fearsome reminder that these past two days I skipped the other thing a mare does at the toilet, increasing the necessity to find a way to get out of this plastic prison as soon as possible.
I re-read almost every book in my library this evening, skipped dinner, and went to bed at midnight. The cramps got so bad that I had to cast a quick anesthetic spell to alleviate the pain so I could have a chance at resting. Now being six-times wet, the diaper was very heavy and soggy, further lowering my hopes of getting a good night's sleep.