Engine shut down while driving and wont restart for a day or so

What is your question?

I was driving about 55 mph when my truck completely shut down and so I tried to restart and it cranked over like normal(not slow nor any dimming of lights) just didn't seem like it was getting the last little umph to start. Replaced fuel pump and filter and it didn't seem like it was getting any spark to the engine somewhere. Checked alternator and battery and are good. It started a day or so later and ran just fine but it's happened to me within the last 2 months I have had it about 6 times now.