Someone hacked my gmail account, help me

[Melanicus 5,208]

Today I was sitting on my computer and suddenly Origin (program for games) popped up and said that someone logged in on my account from another computer. So I tried to log in to Origin and it said that password wasn't correct, I clicked to change my password and activation code has been sent to my gmail. Then, I went to gmail and logged in, but it said that password was changed 1 hour ago. I didn't change password so I know someone hacked me. I filled that recovery page, but I didn't remember half of things like - security question, labels created by me, and I also don't have a back up (recovery) account. How can I get my gmail back, it's really important for me.

[CHOULO19 24,332]

I'm sorry mate, but you looked screwed. You should always have a recovery email. You could try sending an email to gmail and telling them what happened, but I wouldn't get my hopes up.