test positive.

nak tanya , valid ke result ni? saya dah test pakai clearblue 1 lg tu positive jugak. period on time tak pernah lewat tapi kalini dah lewat 4 hari, should be period on 30nov. pakai apps ikut first day last period dia kira dah 5weeks. betul ke? kalau nak check dekat clinic tak awal sangat? tqqq