Making a nursing pillow (c pillow, whatever you want to call it) without a pattern. I'm having trouble putting my measurements for the curve, onto the fabric. Ya know so it's in the C shape I need. First time I had a strait line, seccond it didn't have enough of a curve. Can't figure it out. Any tips? Other than get a pattern. I used up my spending cash. Unless anyone knows where to get one online for free?