Wa'alaikumassalam sis! Okay, first thing first, please go see a doctor atau pergi klinik ASAP, jangan tunggu lagi. They need to check what's happening dengan cycles kamu, bukan self-medicate ya. Lewat 2 minggu tu banyak sebab, stress, hormones, timing, semua benda, bukan automatic pregnancy, tapi kena check properly. I know few of us pernah experience irregular periods, memang scary kalau tak sure, tapi ambil ujian kat clinic je, confirm dulu apa yang happening. Doctor boleh properly advise based on your situation, jangan risau. Take care of yourself first!