Is my car okay? Drove threw 3foot puddle of water?

Ford Mustang 2006 coupe. I drove threw a puddle of water, and i did not know it was going to make my car stall. It turned off and was submerged in the water for a good 4-5 minutes. I tried to turn my car on, but no go. 5 minutes have passed and the engine still did not turn on. 1 hour later: it seemed like it wanted to turn on, no. It seemed like it needed jumper cables. Made sounds similar to a dead battery, but with out the clicking sound.

any advice on how to care for it.
am i screwed?
what could be the damage? Cost repair.
any information would be helpful.

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