muscle pain both arms and legs

Hello, im 19 weeks preggy..im suffering to muscle pain in my arms and legs for 4days now..niresetahan ako ng ob yesterday but it still hurts.may kagaya po ba ako sainyo and ano po ginagawa nyo? Im using ointment ,salonpas and hot compress with doctor's prescription pero naglelessen lng sya ng konte pero masakit padin.pls help advise po.salamat#1stimemom