OS X :: Can't Get To Google Search Page And Get Error Message Safari Can’t Open Page

I seem to be having a hell of a time with all google related things. About 50% of the time I can't get to the google search page and get the error message Safari can't open the page [URL] because Safari can't connect to the server. When I am able to get into gmail, I am constantly being disconnected from gchat, like every 5 minutes. When it disconnects, it will try to reconnect, most of the time unsuccessfully. I then get the error message, unable to reach gmail please check your internet connection. This happens no matter what browser I use. However, when I try to connect from my husband's PC (same network), everything is fine. I've tried emptying my safari cache, tried uninstalling and re-installing both safari and firefox, and I am out of ideas. Any ideas about what is going on, and how I might fix this issue. I searched through the google help, and there were similar problems posted (none recently), but no answers on how to solve the issue. This has been going on for about a week now, and it's driving me up a wall.