Actually, I do not know whether or not my Gmail account is compromised given the details.
I am on a desktop computer right now and logged in to my account. I have got a Windows phone with Gmail synced but it is another account. On the desktop computer, as soon as I log in, I can see a warning below on the right corner saying that My account is being used in another location. I click on Details and it says that my account is used in another location but strangely, it has got the same IP address of my current location. I told you that I do not have it on my mobile phone, and it is always being used here (neither on my laptop!). So what is going on?
BTW, maybe it's because I have the Hangouts open as you can see on the left of the below image. Or maybe not, because such a thing has never happened before, but only for three weeks.