Wa'alaikumussalam wrh wbr! Allahumma ameen, semoga rezeki bulan ni jadi milik mu sayang! A few of us dalam circle try OPK jugak and memang the timing is tricky, but DPO7 with mouth ulcers and nausea tu memang promising signs, kadang-kadang symptoms datang lebih awal drpd expected, especially kalau cycle tu consistent. Jangan stress sangat, tenangkan hati, makan well, and just trust the process lah, I know masa ada history of miscarriage it's scary, tapi positive energy goes a long way. Keep testing OPK and we're all rooting for you!