Question My internet speed is fine, but I keep getting relatively high pings to any gaming servers. Help?

[raspberrylauren]

Up until last week my connection to game servers was just fine. My normal best servers are Chicago servers (as I live in Missouri), but recently my "best" servers have been California and Oregon with a minimum of 75ms. Chicago is now at normally 120-140. Nothing has changed with my ISP. I've done a LOT of trouble shooting and even bought an ethernet cable to try and get it to what it was. I let it go on for almost a week, called my ISP (at&t) and spent around 30 mins with regular customer service, another 30ish with tech support and still no solution. I'm at a loss. I am so frustrated and have no idea what else to try lol. They say my internet speed is great, but I honestly think it's a routing issue. Can I even do anything myself to fix this?

 

[helpstar]

router firmware up to date? did you power it off and on again?
did you try other online games?
check your firewall if it´s set correctly to private
any antivirus software installed?
check the ping with a speed test again