Totally normal. When you're pregnant, your body retains EVERYTHING just in case it needs it for the baby - including hair. I have really thick frizzy/wavy/curly hair anyway, so it was normal for me to have nickel to quarter size hair clumps in the shower (gross, I know). But then I got pregnant and stopped losing hair at all. When our daughter was 4 or 5 mos old it started coming out - huge, golf ball size hairballs. I knew it was normal, but it was still weird, creepy and gross. I think she was 9 or 10 months old when it started to taper off. She'll be 1 in a couple of weeks and I'm back to the regular loss again. Don't worry - it will go back to normal.