I can see a continuous run of your games right up to today, including 5 games in progress and one game waiting to start. I'm guessing that the problem lies with your computer. Try logging in using a different skin (e.g. if you're playing on redhotpawn.com try timeforchess.com) and see if the problem persists. Then there's all the usual stuff, clear cache and cookies and so on. Even logging in on someone else's device.
Please come back to report results, whether or not you get the problem resolved.