Fixing macbook keyboard

So i was on my macbook one day when my dog jumped at me and knocked my tea all over my macbook. I quickly turned it off and then turned it back on an hour later (idiot!!). But then i let it dry upside down for a good two days just to be safe. well when i turned it on again i found that it worked completely fine as long as i used an external mouse and keyboard. all the letters on the internal keyboard don't work but the volume brightness and other top buttons do work along with the track pad. It would seem to me that all i would have to do is replace the keyboard but the weird thing is that whenever i use the internal keyboard the mouse gets screwed up and no matter which way i click it it always thinks it's a right click. this problem goes away when i press any key on the external keyboard for some reason. i know the chance of fixing this problem is pretty bleak but is there any way besides forking over $750 to apple to fix this problem? the computer works completely fine but it loses the purpose of being a laptop by having to lug around a keyboard and mouse along with it.