Don't feel like that, we know when something isn't rite, my son didn't have any symptoms I took him in because for two weeks he had dark circles under his eyes and took naps when he got out from school(he's 6 naps went out the window) my pedatrician is so great rite away he did blood work because everything else was physically fine, the blood work showed he was missing 2/3 his red blood cells and near heart failure, now please don't think I'm trying to scare you I'm only telling you this because some of my friends and girls i work with were saying he's probably just coming down with something, i think they thought i was making something out of nothing, anyway my son was diagnosed with ALL in March he's almost 9 months into treatment and doing great, its you right to get a second opinion! Good luck