Crinklestuck

Day 1

In the morning, the aching in my bladder and the soft plastic-y noise between my hindlegs reminded me of my predicament. I was glad it remained dry, but that did not last long. As soon as I got up, my bladder contracted and I could feel the absorbent material soak up the urine. 8:07. I was standing in my bedroom, completely unable to stop myself having an accident. It was the most horrifying experience, being completely out of control, but releasing after over seventeen hours brought intense relief. At least I will not be distracted by the pain while I continue figuring out a solution.
I decided to keep eating and drinking to a minimum. As a living organism, I have a metabolism, but lowering the amount of food and water I intake should reduce the amount of times I am forced to use the bathroom... that I carry over my flanks.
After a small breakfast, I once again tried removing the diaper by usual means: hooves, mouth, various sharp objects (I did not dare puncture it in case I end up having to wear it for a long time, as that would have a huge negative impact on its absorbency), magic. That was when I noticed something.
The subject item reacts to magic. As soon as I touched it with telekinesis, it pulled its tapes on tighter. To anti-magic spells, it reacted by vibrating violently. I tested several of them, all with the same result. I need to examine the kind of magic I apparently put into the thing.
Side note: waddling on stairs is much more tiring than normal.
In the lab I set up an identification machine based on one of Starswirl's designs. Aiming the reciever at my hindquarters, the readings went off the charts and the equipment burned up. That amount of magic is several magnitudes stronger than the spell I was casting! How could I mess up this bad?
During lunch, Spike complimented my diaper. I wondered if there was something wrong with him, and if it had something to do with the failed magic I cast on myself. When I inquired an explanation, he just shrugged and told me he thought I was trying to save time by not going to the bathroom. While it is not a bad idea, soiling myself for the sake of reading a book is just ridiculous and gross - although, he did point out one positive aspect of my current predicament.
In the afternoon I tried rebuilding the magic identifier, salvaging as much of the previous as I could. While working, I felt the need to urinate again, and since I was already wet, I decided to just let go. No point in suffering through the same pain as last night. It was surprisingly easy, but reading up a bit on the subject matter, I found that in a cold and wet environment, it is natural to be able to go with less effort. It is still holding up, and by the looks of it, it will continue to do so for at least another day. By then, I will have solved the problem for sure.
I was not able to finish building before I needed to eat again. After a quick dinner I told Spike about the problem I was having and he promised he would assist me in any way he can. After that, he asked if he could head over to Rarity's, and I let him, but made him swear he wouldn't tell anypony about my embarrassing problem. I tried reading a book to relax and clear my head, but my thoughts kept returning to the plastic garment I was wearing - and using for the third time - and so I decided to go to bed early.