Minecraft use to have high fps now just below 10 fps?

What has happened to my minecraft? 2 days ago i played minecraft with 30+ fps now it's just like 10 and under fps. What in the world is going on?
i also have 8g ram and 64 bit operating system

Need more information

Check your internet speed people who play minecraft often have their connection bottlenecked by the ISP especially those running a server on a domestic service

Are other games also slower? If so, it could be a hardware problem. Sometimes thermal paste needs to be replaced for your stock cooler to continue cooling as it used to. I have read where people regained 20fps just by changing their thermal paste.
http://www.tomshardware.com/forum/383342-33-laptop-graphics-card-upgrade