I don't think you need worry. It's all, in my opinion, a matter of gradually building up the muscles and relearning.
I am 13 weeks post op today. No sign of a limp when walking, but still have start up stiffness/limp.
On holiday in France now, and since arriving Friday night we have walked for a couple of hours round town, cycled 5-6 miles each day, swam (actually mostly climbing the stairs to the slides) for an hour or two each day. Yesterday we also climbed the 300 steps of Phare La Coubre near where we are, then I practised golf - pitching, chipping, full swing x 1 basket. This morning I rose at 6am, warmed up with half a basket ... And played 18 holes, carried my bag all the way, concentrating on walking with butt muscles firing. 12 over par at Golf du Royan, my first 18 since pre op, felt great. Hitting the ball further than pre op now.
Why tell you all this? Well, my butt is tired. And I have a limp now. Tomorrow will be rest, swimming in the lazy river! Then I reckon I will be back stronger on Thursday, limp free.
This to me is the evidence that it is all about re-building strength, doing the exercises diligently, making and taking the time to heal well.
I really hope your surgeon says all ok, just be patient and continue the physio. I'd wager he will.