Is her Tawaf considered valid if she completed six circuits instead of seven due to her confusion about the number of circuits?

Whoever doubts the number of circuits during circumambulation (Tawaf (definition)) should base it on the minimum (that which is certain), and this is the most preponderant opinion. Alternatively, they can act upon their predominant presumption, as preferred by العلامة العثيمين (Allamah Al-Uthaymeen), especially for those prone to obsessive doubts (waswas). So, if someone doubts whether they have completed five or six circuits, and the doubt is equal, they should consider it five. However, if they predominantly presume it to be six, they should act upon their predominant presumption, consider it six, and then complete the seventh. A person prone to obsessive doubts should disregard the obsessive thoughts.