Nothing is wrong with you, and you have just described the experience of a very large number of people who eventually book.
What usually sits behind it is not doubt about counselling but what booking would mean. Making the appointment turns a private difficulty into something with a date on it, and that can feel like admitting the problem is real and large. Closing the page restores the previous arrangement, in which it might still turn out to be nothing.
Two things that tend to help. First, lower what you are deciding. Booking a session is not a commitment to a course of treatment or to a view of yourself; sessions here are booked one at a time and stopping does not require a reason. Second, use the smallest possible step. The free ten-minute call takes no payment and no card details, and it is deliberately short, so the decision it asks of you is much smaller than the one you have been closing the page on ten times.
Also worth saying: you have now written this out and sent it publicly. That is not nothing. It is already further than the page you kept closing.
This is general information in reply to a public question, not advice about your own situation, and it does not create a client relationship. If you are in immediate danger, contact emergency services.