Your mention of "kind of foggy looking in the middle" and the location of that area suggests to me inadequate fixing, perhaps largely due to ineffective agitation. If there is truly any milky appearance in that area of the negative, I would re-fix with good agitation and re-wash as a first step. I ran into that situation with a foray into 4x5 film in pinhole work a few years back. In my case it was a T-grain film that seemed to need more than the usual time in the fixer.