Help!!!

I have an 03 Jeep Cherokee! One day I had just left
work and went to grab dinner, while waiting in the
drive threw with my car idling it died, I thought
maybe I had ran out of gas or something even
thought I still had 1/4 tank. When I would try to
start it, it wouldn’t turn over acted as if it was
flooded or something. After about 15 minutes it
started right up. I then filled up the tank, and went
about my day. A few days later the same thing
happened, I knew I was almost do for an oil
change so thought maybe that was the issue. I
went yesterday and got it changed... finally last
night I was leaving the grocery store and started
my car while putting groceries and kids in the car,
it never dies while idling, nothing. I got about a half
mile down the road and going down a hill it acted
like had died again, this time though all my dash
lights came on.. check gages, engine check light,
etc. once I reached the bottom of the hill I started
look for a place to ease into but it just picked up
and started driving fine all over again! What could
it be!!! I’ve been told fuel pump, thermostat gasket,
oxygen sensor, fuel filters... I am desperate for
help.