Shoots of lightning? No. That sounds like nerve pain, and you should definitely mention that to the doctors if you haven't already. I've only had nerve pain when overstretching during PT. I'm a bit lucky in that regard, because another patient had nerve pain in the Tibs as well, even though she did femurs. But eventually it went away when she slowed down the lengthening.
I'm not surprised that they didn't prescribe oxycontin to you. That stuff is really good. Addictive, but really good. But double up on Oxycodone if the pain is too much. You can always be more conservative with your pills later on. For example, for my first two weeks, I took 2 Oxycodones per 4 hours. Along with a Oxycontin per 12 hours. Along with 4 advils per 4 hours (don't take Advil like I did.).
Afterwards, I started taking only 2 Oxycodones only when I feel a lot of pain, and only take 1 all other times. Eventually towards the end, I only took one oxycodone, except for when I go to PT. And I stopped taking Oxy at night. Finally when I stopped lengthening, I quit all pain meds. A week after lengthening, almost all pain goes away.
As for Tylenol, I take a 8 hour release one. They're 650 mg each. You're allowed to take up to 4,000 mg per day. So I only take two pills per 8 hours (1,300 mg per 8 hours). Times 3, that's 3,900 mg per day.
Anyway, you're really brave to do all 4 sections at the same time. Man, I did only femurs and I already thought that that was too much.