Girls, please help me understand what's happening. This is my first attempt to conceive. Today is 12…

Girls, please help me understand what's happening. This is my first attempt to conceive. Today is 12 days past ovulation (DPO). On the sixth day, I took a test out of curiosity and saw a faint line. On the seventh and eighth days, the tests seemed blank—I didn't look closely. But from the ninth day onward, all tests show clear lines. The only symptoms I have are breast tenderness and frequent pulling sensations in my stomach and lower back. Initially, around day three, I experienced stomach pulling and tingling. I don't feel nauseous, but I sometimes feel dizzy, which happens to me often. My discharge hasn't changed. I really hope everything works out. Yesterday, on 11 DPO, I took a test in the morning and saw a barely visible second line. In the evening, I tested again, not expecting much, and also saw a faint line. This morning, I took another test at work around 10 a.m., and the line was still faint but slightly darker. I just took another test now, and the line remains faint and hasn't darkened.