360 sign in and Connection really slow for me. What should I do?

Ok, so today I boot up my 360 and it did its auto sign in for my main profile. But for some reason everytime I do this now its alot slower then it was before today. I get that Xbox console looking load thing with the circles that indicates its loading and it does that for quite a while then log in. Also, when trying to connect to live, that loading is really slow to. Is this a "my 360 is almsot dead" kinda thing, or do I need to clear the cache or something? I just cleared the cache not to long ago and it messed up some of my saves I think. Most of the dashboard loading is really slow now. What should I do?