hi,,im 20 weeks and have just had my 20week scan and all was fine apart from the placenta was lying low so i have to go for another scan at 32 weeks..i havent felt my lil boy move yet?i dont know if this is normal at 20 weeks but i would have thought by now i would be feeling something!my bump goes really hard at around tea time and feels really heavy at the bottom.am i just worrying for nothing?