Crashing at launch

I have had this problem since 5:00pm on 11-23-17. I tried to get on Minecraft it launched then I tried to go on a server, it wasn't responding and the game crashed. The morning of 11-24-17 is when I tried to launch it but once I clicked launch, I waited a few minutes the app didn't open. And this has been happening all day, and if it does open it immediately crashes. What is happening and if you can. please tell me how to fix this!