The twinges will continue as you challenge your system - I still get some every now and then, but keep an open line to your surgeon's office. I had absolutely no problem calling for anything that worried me, which kept my state of mind calmer. Having said that, remember that your body has been massively manipulated, and it will take time to heal and improve.
In my opinion, you are fixing the following:
1. Your muscles that were manipulated during your surgery, both large muscles and smaller, which IMO, require more work to restore since most traditional exercises deal with the larger muscles.
2. The muscles that have atrophied or become weaker during the years of impact with OA. With the reason for pain now gone, they are being called into service again, and will need time to become alive again.
3. Your mental state. I was frequently depressed and gave up on things that I did not want to give up. Restoring this to a positive state was a challenge for me, something I worked hard on before and after the surgeries. It drove me to be as proactive as possible; I think we're all doing this, as evidenced by being on this site and talking to each other.
Good luck, you sound like you're on the way.