water in the engine

its flooding in houston, on my way to school this morning i had to drive through some deep water, looked about a foot deep, till i got in it and it was about 2 feet deep, i took it slow but i didnt realise how low our intake inlets are and it sucked up water and killed it, my brother pushed me out in his truck (now i have scratches all in the back bumper ) and i bought a new airfilter before heading back and when i started it, it ran really bad for about 20 seconds then got better, but now i think its running a lot more rich and hesitates/ sputers sometimes and blows white smoke, i took my intake all apart and there was no sensor in the MAF sensor, only a metal grid shouldnt there be something in there? also my oil pressure is lower than usual, but not in the red. do you think its ok to continue driving? im afraid i might have damaged some internals.

i changed the oil the day it happend and there was a good amount of water in it, there was also water in the rear-end so i changed that too.
is there any way water could have gotten into the tranny?
but the car seems to be running ok now, but my gas millage has decreased significantly, i filled up today and calculated 23.x when i usually get 26.x if the o2 sensors went bad would it through a code, or is there a way i can check them with a multi-meter?
thanks