get on top of (one)
To overwhelm one to the point that one wants to avoid the the thing or situation. If you don't do your homework now, it will get on top of you later. I don't know what I'm going to do—the credit card bills have just gotten on top of me.
get on top of you
If something gets on top of you, it makes you feel sad or upset, and you are not able to deal with it. I was so fed up. Everything was just getting on top of me. Things have been getting on top of me lately. Business hasn't been good, they're talking of firing some of us.
get on ˈtop of somebody
(of a problem, too much work, etc.) make somebody feel very worried or depressed: She’s letting things get on top of her at work.