I bought these jeans with a full belly panel in a size medium a few weeks ago. The size small was too tight in the knees. But now, the panel and the butt area keep sliding down. If I fold the panel down, it gives me bumps and weird lines and I like a more streamlined look. Would a belt help at all? (not for the panel obvs). It's so annoying :( and no, I cant return coz I had them hemmed.