Theres a lump on my lip. What is it?

I woke up bout three days and I had a pimple so I popped it. Then woke up later and my whole face was swollen including my lip. every night before, I would popped it some more and more yellow ooze would come out of it. So now it still there and there's a knot there the size of a quarter on my lip on to my nose. What should I do? some people have told me its a cold sore or fever blister.