Dana, I started running again 3 weeks ago after a long hiatus. I've been running 2.5 miles a day 6 days a week. I stretch for about 10 minutes before I start, then I do a 2 minute brisk-walk warmup and a 2-3 minute cool down. Today was the start of my fourth week running, and I got a pain in my left shin half-way through my course and the pain was so bad I had to walk/limp the rest of the way back home. I just bought a brand new pair of expensive New Balance running shoes with very good arch support. They're extremely light too.
I eat good (bananas, yogurt, Myoplex shakes, cottage cheese, salad, chicken, etc.) and take multivitamins, other vitamins, and a couple supplements. I know not to run on the balls of my feet... but to run heel-to-toe. I don't know if this is a shin splint or what, but it hurts like hell and now my left calf is tight as hell too. WTH is going on?