Walking after non weight bearing and knee surgery...?

I was non weight bearing for 6 weeks and had knee surgery due too a ripped ligament from a dislocation and other things....but anyways I started weight bearing on the 23rd and was working my way up too one crutch and most of my weight on my knee yesterday. Today I was determined too walk so I got up and started walking (without any support or hanging on too anything- I had a brace on though)! I was determined and somehow I did pretty well with only a minor limp. My surgical knee feels fine when I walk along with my good knee but I have MAJOR discomfort with my foot on my surgical leg when I walk. Any time I walk my foot and ankle will feel like it will clapse. My foot feels like it is compressing and hurts a lot. I didn't hurt my foot and ankle at all but why does it hurt so much? Is this because I was nonweight bearing for 6 weeks? It is only the foot on my surgical leg. It mostly is the top part of my foot that hurts when I walk...like where the arch is- it hurts both top and bottom on the arch of the foot.. Mr P.T didn't know why...he wasn't concerned though but it HURTS! Thanks