My wife made me do it
 

My wife needed to back her car, my 1999 f 150 v6 4.2 was slightly in the way so I put I N and rolled in back always about 10 / 15 feet. Not enough she says so I tried to start it,no start. Not long ago I replaced fuel filter,coil,spark plugs,egr etc. could having rolled it back caused anything? Next I plan on checking the fuel pump relay, I think it's under the hood. Where else should I check?

Sounds like your neutral safety switch might be messed up. Rock the truck a few times forward and back, take it out of park, place it back in park and try starting it.