Aihhh I understand the feeling, sabar je dulu, UPT samar sebelum period memang normal, banyak mum friends ku pun gakniak positive sampai a few days after period delay! Since you had intercourse during peak fertility, there's definitely a chance, tapi the hormones are also building up before period which boleh buat breast sakit and body uncomfortable jugak. Best is tunggu a few more days and retest or check with your gynae if you're worried, they can do a blood test yang lebih akurat dari UPT