You changed something and now you seem to have networking problems.
Then you reset your router.
Now you are talking about replacing your modem/router. Isn't it working? Aren't you on line? or are you using a phone for e-mail.
Figure out what your problem is first, by thinking, looking (did I plug the right shit into the right places?
Did I break a wire in one of my connectors?
Did I damage a port?)