hi Jalgal,
do take good care of yourself this pregnancy and try not to worry too much, cos it will affect your mood which may not be healthy.
not telling anyone for the 1st tri a norm of being superstitious, but even my gynae say so dun tell too many ppl until the 12weeks, because, touchwood if anything happens, you may disappoint a lot of ppl, so best is after the 1st tri.
also if im not wrong, you can go polyclnic to do checkup, but they dun do scan for u, they check your BP, urine protein test and give u supplement. they will refer u to KKH for US scan instead.