I was feeling pretty good. Went back to work last week and continued with PT. Started to feel I did not need the cane and used it sparingly. Thursday started to get some swelling in the leg and there is soreness in and around the hip. Incision is real sore. Feeling like I took a step back. Tried to rest yesterday but still sore today. Should I go forwards and get on the treadmill today (I want to continue to rebuild) or should I try to rest again? Is this normal?
I think we take steps back all the time during the recuperation, usually when we try to change the status quo. Going off the cane now stresses the muscles that have been supported by the cane. I'd call it normal. I certainly had soreness when I went off any support.
You're still early at 6 weeks, and I know it's annoying, but you've got to be patient. At six weeks, I was still on a spin bike (a little bit of resistance, but not much). I didn't get on a treadmill until about 12 weeks, and that for walking. I did that and an elliptical for a while.
The treadmill might not be the best thing where you are, since you need enough balance to stay on it correctly. Maybe one with side supports, so you can support yourself while you walk on it. My advice would be to check with your surgeon and your PT for when you can go on it.