Eh, kalau dah lewat 4 hari dari expected period, boleh la ambil pregnancy test dulu at home, pastu confirm dengan doctor kalau result positive! Sebab tu the most reliable way to know, especially dalam early stages macam ni. A few of my mum friends semua test at home dulu before going to the clinic, and the test is quite accurate pun kalau dah lewat few days macam yours. Better to check with your doctor soon je to be sure, hopefully good news!