Cheif Grand Cherokee

Lastnight after parking my grand cherokee i went to start it up agian and it would run fine until i put it in drive and it would almost bog down, after playing with the gas it progressively got worse. I was playing with the shifter while doing this thinking i was stuck in sugar sand and noticed when the shifter was in either R N D 1 2 it would want to go forward like it was in drive. This was even happening in reverse. After trying to crank it agian i could smell gas like it was flooding out and would run rough and eventually die. I have no clue what this could be! Someone please help my jeeps still sitting in the middle of the woods! Its a 2000 with the 4.0 and it is 4x4.