A friend of mine had very vivid dreams at 7 dpo. She didn't think much of it at first. But she also had some lightheadedness. As she continued to monitor her body, she realized these could be signs of early pregnancy. And indeed, she was pregnant. Another success story is a woman who felt more emotional than usual at 7 dpo. She was more sensitive and teary. This, along with some abdominal twinges, was part of her body's response to a successful fertilization and implantation. She had a great pregnancy journey.
One success story could be a woman who experienced mild cramping at 7 dpo. She initially thought it might be her period coming early but then found out she was pregnant. The cramping was actually an early sign of implantation. Another example is a woman who had breast tenderness at 7 dpo. Along with some fatigue, these symptoms turned out to be signs of a successful conception. Later, she had a healthy pregnancy.