hi ronleung
how long do you feel sad? is it a long time? what's the reasons behind? do you have friends to voice out your feeling? how about your husband? can you share your feeling to him? if there is really some problems behind, discuss with him and try to find the solution to solve it. if you feel tense, take a vacation leave to take a rest. keep your mind towards 'bright' & believe nothing is bad if bb is ok, right? every problem can be solved ! if the condition still persists, seek x dr's advice. pray x you & bb!