Hi my name is Zach and I own a 2011 g37s sedan, last night i noticed a bit of water leaked onto the passenger side floor mat from under the dash but didn't think too much of it.

Now i went to go drive to class and my battery is dead, and when jumping it off my mothers car the push to start turned on the ignition but the engine took forever to even attempt to turn over. eventually it did turn over but it will not run at all.
i am having it towed in the morning but is there anything else i can do to try to at least get it to run?
there is also a yellow light on the dash that says key that i don't recall ever really seeing.
any knowledge would be especially appreciated thank you
also noticed the brake lights on the rear and the turn signals are turning on and off while the car is parked out front as i am typing this, when i went to go look there is a weird humming coming from the car

 

also just noticed the signals and the brake lights are slowly flashing

 

Sounds like the IPDM is waterlogged. Take it apart, dry it all out in a bag of rice, clean out the drains in the cowl so water doesn't spill on the IPDM, cross fingers that it all works fine once reassembled. Check the main harness hole in the firewall and silicon it up better if it's leaking into the cabin.