Stabbing pain? Please help?

Ok so I have a really bad pain in my Achilles tendon. I looked it up on google and it said it could be microtears which are caused by pushing and pulling and constant pushing off of that leg (I do speed skating and that us exactly what happens) but does anyone think it coul be sonethin else? Any ideas to help it stop hurting and heal? I have regionals in a week and can hardly practice... Help??