I've been dealing with the same thing...but unfortunately for 2+ months. I don't know anything about your situation or where you're at in your season, but my suggestion would be too take a decent break (7 to 8 days maybe 10-12 if possible) to make sure the thing is gone . When I buggered mine (doing strides on the grass in early August) I took like 3 days off and started again...it came back after a couple days. I took another three day break..it came back. That's happened four or five times now and I've never made it more than a week and a half into the comeback before it went down again. It was never very painful walking around but each run would get worse and worse and I would get crepitis (that kind of creaking fealing when you move your foot from plantar flex to dors flex)...but no lumps or anything. So basically trying to nickle and dime it is no good...and be careful that the cross training isn't aggravating it...I was pooling 65-90 minutes a day for a while before realizing that it wasn't improving and I think that was contributing to it so I'm in the midst of 8 day break with no activity. Had I just rested in properly back in August I wouldn't be in such a mess.
Sorry, enough of talking about my situation. Leaning against a wall and doing heel raises is supposed to be a good one, but I wouldn't go about trying to stengthen until its healed, same thing for stretching...too much of that can be bad. Also, if you have access to a massage person who knows what they're doing see if you can get them to work on the deep compartment beneath the achillies (that seems to be working for me) and the calf itself, and try moist heat on the calf before you start cross training and before you run (in theory tight calf yanks on achillies and heating can help with that). Good Luck!