It sounds like you got distracted which happens to all students at some point in their training. It will even happen a few times when you start flying your 2nd type plane like a low wing Super Sportster. You just need to hang in there and get more stick time to learn to focus on what you are doing. Then it will become second nature and you will be able to fix a bad situation with out even having to think about it. Or better yet, see a problem coming up and fix it before it becomes serious!