Iphone 5S Screen not sitting flush!

[cap2587]

I went ahead and replaced the battery in my Iphone 5S. I must have done something to the screen or there must be something not allowing my screen to sit flush at the top. I think the screen is slightly coming away from the frame and it also doesn't seem to be able to push down into place where you hear that snap. The bottom is fine, just the top. What are my options and what could be causing this. Sorry f the pics did not come out very clear. Thanks