By Melissa Heglund I often ask myself why I keep my positive pregnancy tests. I know it’s a magical moment and everything. Sometimes I come across them when the box of Band-Aids tips off the shelf again, and I remember that I was feverishly cleaning the house that day. I stopped and held the broom in my hand and thought about it. I went and checked the test. *** I’m also not quite sure why I have a bike hanging in my garage that has a flat tire on it, except for the fact that a little boy once rode it. Actually, he learned to ride it with no training wheels when he was only three years old. He liked to skid the best…