BiggB3504

I just bought my 05 f15 super crew 5.4 4wd truck in November. I was recently driving and got stuck in a snow bank to avoid a collision. I was already in 4wd when I got stuck, after trying to get out on the first attempt I switched to 4wd low and that didn't do anything either. I didn't hear any funny noises or anything. So I had my wife work the gas while I tried to give the truck a nudge. At this time the truck was back in 4wd and I notice my front wheels weren't turning just my rear wheels. When the *** is in 4wd the dash light comes on, but when it's in 2wd it won't change on the dash. Any ideas fixes????