I'm am currently using 1.14 optifine because my computer is really bad, and one day I try to log in, and nothing happens. I click "launch" and after that, nothing happens. I try it again and it says that there is already a game running, even though I can't see it. 

I try different versions, with and without optifine, and still nothing happens. I've gotten to the point now where the actual launcher shows up, but it stops and freezes with the red bar very close to the end.

I don't know if this is my computer's problem, or if something is wrong.