after taking out my driver's side seat to replace the track(which was a total disaster due to a broken track that was sent to me) my airbag light is now flashing on my dash and cant find anything on it since i have the second generation g35sedan. any help is appreciated.

It means your airbags have an issue. There is a sensor that detects a person in the seat, which activates the airbag, or there may be a problem with the side airbag since it is built into the seat. It may have become disconnected or damaged while you were fixing the tracks. You may have to bring it in to a qualified repair shop to check it out.

Make sure all the connections were tight first?

^^ That would be my guess too; something didn't get plugged back in.