Space bar

So my space bar on my macbook got stuck, looked online and common theory i saw was dust and it recommended cleaning the sides so i used a paperclip and the key popped out, so I tried to pop it back in and couldn't looked up videos and found out it was kind of common, I know I need to take it in to get it fixed, but I have finals and a paper due this and next week so don't have much time. Was wondering ifthere is a way to designate one of my other keys as a space bar until then? Right now I am typing with no key on my mac which is probably not good and is quite hard to do.