someone got in my comcast account should i take it in.

Take what in?
The first thing I would do is contact Comcast customer service and let them know.They will know what to do.

i already did that and had to change my password.

I'm with Geo... take what in? If you've don't what Comcast told you, you should be good.

Are you by any chance referring to someone using your router? Maybe all you have to do is setup wireless protection... Like WPA with a big ole long passphrase.

i try to log in to my comcast account and it refuse my old password , so comcast gave me a new one now i can log in.

Ah, yes, you'd have to call Comcast for that one -

i did that is how i receive a new password, they said someone tried to break in my account.