Yes: I felt as though I was constantly sitting on a rock. This started for me after about
1 week and continued for over a month. It finally went away. Yes; getting erections while sleeping is a very good sign. But they vanish once you awake. This is normal too. Don't push things. Let yourself heal.
I hope that you are luckier than most, but resolving ED may take 9 months to 1 year or more for guys at our age. It took me over 1 year, but things are now resolved for me. The reason why I mention this is that many doctors do not give an accurate timeline and we get depressed that we cannot achieve erections in a matter of a few months. Your early progress is a great sign though. Good luck.
Bill K. from NJ