Secondary monitor resolution messed up

So I have just installed my secondary monitor simply to multi task as I play games on my primary one. Everything was going well until I did something stupid I wanted to switch it and make my games come on my secondary and browse on my primary. When I did that I didn't like it so I undid it. When I did that I launched a game from steam and I looked over at my screen and half of it is taken up my my primary screen.
So say I had chrome open I put it to the far left of my primary screen where the game pops up I launch a game and half of chrome is on my secondary monitor and I didn't put it there. Sorry not the best explanation but it's the best I got at almost 1am any help Plz I need to know soon thx.

Sorry it didn't work :/ anything else

I'm going to try and show you guys in a picture maybe that will help

I took the before and after pictures once I open a game of any type half of my secondary monitor is taking up by whatever was on the left side of my main monitor

No sorry I know about that and that doesn't work here is another before and after pictures though (in the middle of taking the picture I realize I haven't tried a different game. So I did ,the third picture, and it does the same thing but not as bad. Tried a different game, fourth picture, and it didn't do it at all??)

My main monitor is connected via hdmi and second monitor is dvi