I've been OIC for a couple of months with Achilles tendonitis, rested and did the heel drops, and it began to fell better. I started running again very tentatively, C25K from week 1, one run of each week, paying attention to picking up my heels, and it all seemed to be going well. Today, though, I have cramping in that calf - is that part of the same injury? It felt OK yesterday during my run. Any advice?