Problem:

I had a Full-Thickness Skin Graft done 7 weeks ago on the lower inner side and bottom of my foot, but the bottom middle of my foot where the skin graft meets my regular skin, it won't close all the way theres just a little crack there. Around 5 1/2 weeks I started to try and walk on it and it was painful and along the bottom of the graft the bottom of my foot it started to seperate from my regular skin having a space in between where it looked white. but rather the hour spent that day trying to walk on it, I  havn't put really any pressure on it, sometimes just on my toes, kept it wrapped with a ace bandage and gauze, the rest of the graft looks good just the very bottom middle of my foot isn't healed all the way and in the crack it has a white kind of yellowish color to it. But the bottom has healed some since trying to walk it, just that little portion has not. Im in college right now can't see my doctor for another 2 weeks.

Questions:

1.Will this eventually heal?

2.What should I and should I not do until it does?

3.I keep it covered up when i shower should i expose it to water or not?

4.Could walking on it further rip open the graft eventhough most of is already healed?

History:

This is my second skin graft done, i got the first one a year ago when my foot got infected from the river water and a quarter of my foot turned black, Doctor debrid it and did a split-thickness skin graft(first time), I got the second one done because the first one couldn't heal all the way because of the contraction it got tight and couldnt finish healing also there was really bad scarring.