yeah l agree with running girl... iron levels could be low... simple blood test at docs will confirm... look at your life too... if you aren t totally happy within you can kinda be tired 24 7.... drink heaps of water pretty much all day... look at your diet... maybe check into low GI eating... l did and have changed my eating habits... feel like a new chickie babe...also make sure you are eating plenty of veg like the good ol green ones.. try excluding the humble spud ... not an age thingy is it.. not sure how old you are could be the dreaded change kicking in.. best o luck