No oil pressure and loud clicking

Hello :)
I'm having a major problem with my truck. Yesterday it stormed really badly. On my way home from work I came upon a street that was like 5 or 6 inches deep in water. Apparently I was too low so my truck flooded out. Everything under the hood got wet and it stalled. Eventually the battery went dead from trying to start it. A friend came and jumped me off but the truck still sputtered/died for a while afterwards but eventually evened out.

This morning when I left for work it started clicking very loudly and the oil gauge was all the way in the red and while it drove ok there was not as much power.

Any ideas where I should look first or should I just start savin for a new one?

Here's a short video of what's happening.