If your shoes are close to a year old, that may be the cause of your calf pain. A general rule of thumb for runners is that they change their shoes every 3-4 months or 300 miles. How many miles a week have you been running ? If you're over 300+ miles, it's time to change your shoes.
I can trace most pains I have right back to my shoes when they start wearing out. In fact, it's time for me to ditch a pair of shoes I've been wearing too long too.
Also, one thing you might consider trying is using more than one pair when you run. Have 2-3 dedicated pairs of running shoes. Rotate them. wear one pair one week and another pair the next so that the support doesn't wear out as quickly. When I was running, I used two pairs of shoes to make them last longer.
And do you do any rolling ? If not, rolling with a foam roller will help. www.performbetter.com/webapp/wcs/stores/se