Mac Wireless Keyboard is Action Weird

Okay, so suddenly my iMac wireless keyboard has started acting strange. I was just working some html/css code for school. I got up, went to the bathroom and when I came back my keyboard started acting up.
If I press the "o" key it is automatically capitalized "O".
If I press the left shift key all by itself it also displays a capital "O"
If I press the enter key it not only returns but also types "\"
From testing out the rest of the keys, those seem to be the only ones acting up. I just don't know why.
I found a different discussion with someone who had a similar problem and it was suggested that maybe liquid got it, which would make sense here but I literally walked away for 3 mins and came back to this. I'm the only one awake so I know no one else touched my computer.
I've tried turning the keyboard on and off.
I've disconnected it and reconnected it.
I've told it to restore default modifier keys
I've restarted my computer
I don't know what else to try.
Please, can anyone help? Luckily I have a logitech keyboard that allows me to type (Obviously this keyboard works fine.) but I'd like to ket my wireless back.

I didn't reset the PRAM settings but I marked your comment as helpful because I know useful that can be.
I actually left my keyboard off all day and used my logitech. I turned it on just now to see if it was still acting up and it is now working perfectly fine.
I don't know why but sometimes devices just need to be given a break I guess my keyboard was one of them.
Thank you for your help Barry.

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Happy Thanksgiving Day! Since both of your wireless input devices are not working at the moment, do you have a wired mouse you can use to straighten this out? Here are some troubleshooting steps to try:
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