My Left Foot Has Been Hurting For About 2 Weeks,

My left foot has been hurting for about 2 weeks, I can no longer walk at an incline on the treadmill and it hurts if I try to flex up or move it to the right. It's the top part of my foot. I even have trouble sleeping. If I put a pillow under my leg it helps so the foot doesn't touch the bed. I began working out a month a go and have been using ladders a lot for the remodeling of our home. I'm thinking I may of injured it while performing one of these activities.