Alang-alang double line dah keluar, tu sign kamu tengah fertile period lah! Biasanya LH surge (yang test tu detect) means ovulation akan jadi dalam 24-48 jam, so the best time to BD is sekarang atau esok, jangan tunggu sampai jadi negative haha, once negative dah, mostly dah terlewat. Kalau kamu regular period, tracking mmg boleh jadi accurate guide, tapi best still lah check dengan doctor or fertility specialist kalau kamu serious nak conceive, especially since ni first time trying. Good luck tau!