Keyboard Shortcuts and Broken Keys

This literally happened to me in a matter of minutes and it's a blur to me as to how it happened, but now it seems as if there is no point of return...

Someone spilled something on my delete key and it was pretty sticky so I decided to take it out and clean it. After a few minutes of picking the key to get it out, it relinquished itself and I wiped it off. I then put it back on and now it simply doesn't work when I press it. Am I going to have to go to the professionals to fix it? I later did the same to my Volume Up key to see how I may have screwed up the delete key and it inevitably messed up as well. For a short time my trackpad wouldn't tap when I tapped it so I had to go into the system preferences and turn off the function of the trackpad ignoring accidental taps on the keyboard or something for it to work, so my delete key must currently be pushed down but not functioning correctly (I don't know)... Then I somehow crewed up my keyboard shortcuts and now some functions work while others do nothing. On word I can use the shortcuts to save and underline, but can't use them to bold and undo. I use the latter more than the former and I don't have a clue as to why this has happened. Any suggestions?
Thanks