Hi Rach,
I'm now 7 weeks post op. You are describing exactly how I felt in the first days and weeks after the op. My operated leg felt longer. I think I might have been leaning my weight onto the non operated side, making the operated leg feel longer. It doesn't feel that way now, length feels normal. It took me 10 days to start to feel mildly comfortable on the raised toilet. I found that it helped me to sit very slowly, taking my weight with my hands and to sit with the operated leg straight. Again, all is good now. I iced regularly and had very little swellling. You should definitely wrap your ice pack in a cloth that insulates it from your skin. I used reusable ice packs and also always made sure i worked to dry the outside of the plastic so condensation from the ice pack wasn't getting into my wound as the pack warmed against my skin. This was with infection in mind. I began to start to feel like myself again after about 7 days. The experienced members on the forum say all the time that everyone heals differently and there are ups and downs. I found them to be correct. At seven weeks, I'm now working on getting strength and flexibility back, every stage has it's challenges but what you are describing is absolutely normal.
All the best, mike