Wa'alaikumassalam! Susah nak tau just from the dates je, sayang, period yang pendek boleh jadi normal untuk some of us, especially kalau stress atau ada changes dalam routine. A few of my mum friends experience variable cycle lengths and they're perfectly fine. Best way is to do a pregnancy test around 10-14 days after hubungan intimate, or just check with your doctor if you're worried, they boleh check dengan proper methods and put your mind at ease!