Inventory issues!

[CrystalNole]

All my mods work fine and everything, all my items, NEI, no issues with that, but when I open my inventory or anything that brings up a GUI where I can move items around, I can't pick them up. I can drag them by clicking and dragging around, but it's not practical at all and isn't a solution. I also can't shift click them at all, and the only thing that seems to work normally for it is the mouse scrolling, which is basically for counting out things to me. If anyone else has had this problem and found a solution I beg you to tell me, I've tried to play all day like this and I'm done with it. Thank you -Crystal