Achilles irritation

 Hi guys, I need some advice.  I have an injury that I have never had before. I have a very irritatied achilles tendon.  You can feel tendon sliding and how rough it is when I flex and extend my foot.  It is more of an achy feeling that progresses to discomfort through out the day.  I did this about a week ago and thought I could just push through it.  I have been walking 3.5-4 miles every other day and doing the C25K in the process.  I have taken the past 3 days off (and I am hating it) to use heat and voltaren gel on it.  Feels a bit better but still sore in the afternoon.  Is this something that I need to rest until the discomfort is gone??  Had anyone else had this issue? I don't want to end up in a brace for 3 months  but I dont want to completely suspend training if I dont have to. I appreciate any feedback!!!

Kat