Car won't start

[rkvin21]

OK so on my way home I heard a pop come from my car and the check engine light started flashing. I pulled over and checked under the hood to make sure nothing was loose or out of the ordinary. The light came off and I went to autozone to read the code and it was a cylinder 4 misfire. Continuing on my way home it happened again and the check engine light stayed on. Now when I was nearing my house I had no choice but to go threw this puddle that was approx 7in-8 in deep. My car stalled and would no longer start. I got it towed back to my house. I am assuming hydrolock. I tried starting it this morning and every time I try to try to turn it over all the lights die on the dash and I don't even hear the starter. Any ideas? I would prefer to do it myself but if I must I will take it to a professional mechanic.

Thank You
Ryan