2003 F150 issue

[Black2000Ranger]

Hi guys-
I'm the proud new owner of a 2003 F150 xl sport 4x4. Well I was the proud owner until today when I was in mud and tried to put it in 4wheel drive and I find out that the shift lever already is in 4 wheel drive. The truck is not in 4 wheel drive, but the shift lever says it is. No matter how hard I push and pull on this thing it wont go up. I havent really tried to put it in neutral or low, because I am scared it may get stuck in one of those. it moves to the left, but I really don't have the courage to pull it down. I just can't seem to get it to go back up to 2hi. There are no 4x4 lights illuminated, and judging by how well I can turn, it's not actually in 4hi.

Has anyone else ever had this happen with their truck? It's a 4.6 v8 5 speed with a manual transfercase.
HELPPPP