Thanks for the question – sounds like an uncomfortable experience!
One question springs to mind and that is what “heavy” activities implies. Without meaning to seem patronising, the term heavy has many different meanings and for some, a walk or light jog signifies heavy, whereas for others it might be running a marathon or doing squat in the gym.
If there is a specific activity that brings on the symptoms, it might be worth looking at activity modification – perhaps under the guidance of a specialist.
This brings me to my next question; I wonder if you have seen a Podiatrist post-op?
Some Podiatrists will provide insoles or advice on exercises, but perhaps you could aim to see a Sports Podiatrist who can look at your gait, running pattern and stride (if indeed your symptoms come on with running?) and the can provide you with a program to improve things for you.
Beyond this, reviewing with your surgeon is a good idea, icing after activity and considering anti-inflammatory medicines as required are all good option.
Hope things improve and please keep us posted!