2 mBTC that was outputted as change in a transaction I just sent didn't come back to my wallet Hi I'm new to this so may be asking a stupid question.

I just sent a payment for 198.52 mBTC. There were two outputs. One for 196.39 mBTC that arrived. There was another output of 2 mBTC that didn't arrive and wasn't refunded to the first wallet. I looked on google and I read that the 2 mBTC was change for the transaction. Can somebody tell me how I retrieve this 2 mBTC as it's not in my wallet? 

Many thanks
You don't need to retrieve it.

Your own wallet created that output, and sent it back to a different address under its own control. Your wallet's balance should reflect this change.