When it started hurting in the beginning, had you been doing a lot of uphill training? This is very often the cause of pain in that area. Not all Achilles Tendon injuries are the same; so it still may be that problem. However, a test is, if you run uphill, does it hurt more than on a flat surface? Also, the front of your leg may be too tight and be pulling on the back of the leg; or, esp, the hams tighter and pulling. Be careful in diagnosing this properly, because in some tendonitis injuries, running through the injuries can cause a continued breakdown where it continues to deteriorate, whereas with other sorts of injuries or strains, you can keep running through the pain if you're careful without any long-term consequences. You can alternate ice-and-heat right after running. You may also try come acupuncture in that area, if the tendon or some sort of musculature is simply going tight. However, clear that with a sports doctor, because in certain injuries things such as manipulating or massage can help--but with certain tendon injuries, massage can hurt it. Good luck--and hold off running for a while and cross-train until you figure it out.