Pooh,
Hmn... I personally not those very 'bantang' type. But I try to avoid attending wake during pregnancy. The rest like wedding, full month, 1st year birthday celebration (happy ocassions) all attended. No need to avoid for your younger sister wedding too, if I were you I will definitely attend this joyful and special day of my sister. But up to you, if you or yr family has such practice to avoid attending wedding while pregnancy, then better follow.
As for moving into new house, hmn... I don't find it any problem too. But heard better not to touch any nails or present when the renovation work is carried out.
Anyway, it is really up to individual. Go with whichever you comfortable ba.