Frustrated....

I never thought I would be "one of those" people. You know...the ones you see in the gym...running on the treadmill...for 3 miles! But...I am. And I'm proud of it! But here is why I'm frustrated. I've been running my *bleep* off. The problem is I'm not improving on my 3 mile time. I'm still in the same place I was when I ran my first 5K in September of last year. I really want to improve on that time! I don't want to take 45 minutes to run 3 miles! My wonderful husband has been a great support for me. He keeps saying "you're looking at it all wrong" but I have no idea who I'm suppose to be looking at it. The other thing I'm frustrated about is, for the first time in my life I have shin splints! Curse you shin splints!! It's not my cardio that is holding me back. It's definately stupid shin splints!! I've bought new shoes..that I don't particularly like. I think they are part of the problem. I can't see buying a new pair though! I spent almost $100 on these shoes! So...I'll wear my old shoes and save my pennies for awhile longer for a new pair. And this time, I'll make sure they feel great before I buy them!