tx-
i am suffering thru achilles tendonitis right now also. i am on my second week off of no running. my achilles hurts in the morning when i wake up. until i stopped running, it just hurt a little more each day. now it is hurting a little less each day. this 2nd week it is starting to feel a lot better.
i also have been running a lot of hills.
before i stopped running and the first week stopped, i did a lot of icing and ibuprofen, it seemed to help some at first, but after a week i eased off, because it didn't seem to help as much as basically ceasing the running.
instead of running, i've been pool running 5 days a week for an hour each session (2 weeks now). i've read good things about pool running maintaining your running fitness. i'll find out eventually how good it is when i start running again. the pool running is doing something cause my legs feel like they got a workout when i'm done, but they feel fresher and not as fatigued as after a hard run. i'm not sure yet how much fitness it will maintain, but it's better than sitting on your butt and eating ice cream. and like i said, my achilles is getting better each day, not worse, so it's not hindering my recovery.
also i had a 1 hour massage this week on both my legs. the therapist also did some stretching of my legs. i think it helped in the sense of trying to help address other areas that might be contributing (e.g. tight hamstrings, low flexibility) to poor form which perhaps your calf muscles might be trying to compensate for.
so...
1. stop running!!
2. try to pool run or some other XT
3. ice/ibuprofen as needed (but i think this should be for a limited timeframe)
4. get a massage (or even self massage your calves)
5. try to stretch gently every day
6. phase running back in slowly only after pain has gone away (maybe even wait a few days longer)
my 2 cents...