My computer got a DDOS, what do I do to get rid of this?

It sounds like you don't know what a DDOS is. It's a distributed denial of service attack. This means multiple computers are deliberately using overusing your server in order to take it down. If the attack has ended, you don't really need to do anything. But you should take action to prevent it in the future (how to do this depends on how your infrastructure is set up).