This may sound stupid but I am scared I have leukemia. The reason being is I generally don't bruise easily. Yesterday when I was changing for work I looked down at my thigh and saw a bruise probably the size of a nickel. It is still there, and it is the brownish yellow color. Now, I'm scared more are going to pop up. I was at work today and out of nowhere I suddenly felt tired. I think I'm going to get a physical sometime soon. I should also add that I'll have right leg pain on and off.