Foot Issue

For about 3 weeks I thought I was experiencing pain on the bottom of my foot at the heel. Figured I developed a bone bruise or something and took it easy for awhile. After running some again on vacation and even playing in the pool with my 4 year old for hours yesterday I realize the pain is actually 3 or 4 inches up from the heel right above the bone on both sides. Has anyone ever had this before? Is this an Achilles issue? I have my final 2 races coming up in the next 4 weeks and I'm a bit nervous.