another achilles issue

Sounds similar to the achilles issues I had earlier this year after training for, and running, a marathon. In my case, I tried to do too much speedwork (intervals, tempos, hill sprints) without enough of a mileage base. The result was achilles tendonitis in my right tendon. Lessons learned- gradually increase mileage (~10% per week), and do most (or all) of these runs at a conversational (slow!) pace before adding speedwork. The more slow mileage you add, the more your body adapts to the stresses of running and the less chance you have for injury.

Another thing- being a tendon, the achilles receives relatively little bloodflow. As a result, it can be very, frustratingly, slow to heal (in comparison to muscle tissue). Also, small tears in the tendon (let alone major issues, like ruptures) can result in the buildup of inflexible scar tissue.

My suggestions: see a podiatrist. Forget speedwork until you're confident that your achilles has healed. Work on strengthening and stretching your calf muscles. Look into self-massage (a foam roller, or The Stick). Keep icing. Get lots of rest.

Good luck! I feel have felt your pain.