Ay alam ko yan, mama, ang weakness and heaviness na yan especially sa arms at legs ay common talaga sa third trimester dahil sa weight gain at hormonal changes, pero since di ka makatulog at affecting na ang daily life mo, better get it checked with your OB just to be sure, kasi baka may nutrient deficiency or something else na kailangan i-address bago mag-deliver ka pa lang! One of my mum friends nag-experience din nito at recommended siya ng OB ng extra iron supplement at mas frequent rest periods, so yun talaga ang best way to go para sa peace of mind mo.