I have to re-Login all the time

Before I was always "remembered" and never had to log in. For the last few days or week or so I have had to log in I think every new browser session... but honestly it seems like more often than that, sometimes several times a day I have to re-login. I don't have to type my info in cause it's remembered, but I have to click twice and then find the page I was just going to comment/post on.