Okay, so I am using Bitdefender Total Security 2016 and I was sitting on my computer working, and a notification from Bitdefender pops up and says Port scan detected and blocked. I open it up for more information and I saw the same message and an IP address.. The message was there twice, the first one was a minute before the second one. As of now, I am running a scan on my computer. But I do not have any viruses on it.
The programs that I have installed are Steam, Bitdefender, Google Chrome, and Counter Strike:Global Offencive (game is from steam)
Please help me, I am very scared.. 
Need reply ASAP!!