hi hiroshima,
yah, dun worry about it. same as char, i also saw a faint line around week 5 and couldn't see anything on U/S. but I was confirmed by blood test and could see the sac after resting for 1 week.
but then hor, actually, i'm also a little worried myself now. i've been feeling so 'normal' (think even more normal than elizabeth)... thank goodness that my scan is scheduled next monday...