I have the newest launcher, and when Im in the launcher and click on play it will load till 5-20% and then it will crash, I tried downloading my launcher again and downloading new forge, that helped but now its back again and now I cant fix it anymore

What I expected to happen was...:
I was expecting that my minecraft launcher should do it and not crash
What actually happened was...:
My minecraft crashed when I pressed start

Steps to Reproduce:
1. Opened my minecraft launcher
2. Pressed Play
3. Launcher crashes on 1-20% loaded