I need help please

Someone just added me on skype and i ask him or her why did he/she add me. I keep spamming him/her because he/she didnt answer. Then he/she said, do that again. After that, i think he ddos me. I just got my internet online again. anyways to help protect ddoser?

Resolve his IP, and then ask a mod to see if it matches someone here, since it's against the rules to ddos MPGH members
use resolveme to resolve his IP, then ask @Hero or @Flengo