Samorris

I’m a very new to running and just getting into Week 4 of C25K. In one leg it feels like my lower calf just above my ankle is strained. I can feel it as I walk. Once I start to run it is noticeable but not a show stopper. Does anyone know of good stretches for that part of the leg? I’m a little worried that it could be my Achilles and I don’t want to rupture it. Thanks for the feedback.