Good morning.
Can't say I have had surgery for that problem but I did find out that I had partial SI sacralization which predisposes me for what happened to you. Some of what you mention are likely related.

I am an exercise physiologist by training and might suggest you consider discussion with a provider regarding how your body mechanics have changed that are impacting your activities. You might need to keep this in mind moving forward to what your body needs most.

Take care of yourself, listen to your body and your support system and get the level of activity that you need!