Weird noise happens randomly while braking?

So I just moved from New Jersey to Oklahoma to attend college my buddy and I started driving around going through dirt roads long story short went a little to deep got water in the cab, just the drivers side and behind the drivers seat passenger. Is there anything special i should do? I vacuumed up most of it but I am going to try to hit it again tomorrow. But I noticed a weird sound similar to scratching two pieces of metal together like I have something on my rotor but it only happens occasionally when I brake/accelerate. It isn't steady any idea what it is? Also what else should I check sense I had water up that high? The engine oil seems good. Thank you for all the help guys!