Depends what came first. The toe might have been a symptom that came due to the tight calf. Chicken and egg. Once that is worked out all should normalize. In the short term keep him in more cushioned trainer type shoes. You can even cut out that area in the shoe insert if he needs some relief. There could also be some neural structures involved following the DVT and period of time off walking. Why can't you go for a one-off private paeds assessment while you are waiting for the other physio to come through?