fuel problems

HELPPPPP!!! Hello everyone. Starting the beginning of the year are started having problems with my fuel notification. Specifically while driving down the road the gauge will read 3/4 and then jump down to empty. It will do this a couple times before remaining empty requiring me to fill up...

i recently bought a 2004 explorer 4wd v6. within the last few weeks it's started acting up. The engine seemed to just choke out on me while driving one day. I put it in neutral and started the engine again, and it ran fine. It has done this now a number of times and now it doesnt want to start...