Self blame fills the gap

Look at the bottom of the loop again. When a loss has no explanation attached to it, the explaining does not stop. It just gets done internally, by you, at two in the morning, using no information.

The lifting. The argument. The flight. The coffee. The thing you said. The month you were not praying properly. The fact that you had not wanted it enough at first, or had wanted it too much.

None of that causes a pregnancy loss. Not one item on that list. The overwhelming majority of early losses are due to things that were settled before you knew anything was happening, and nothing you did or failed to do put them there.

Plain information is one of the few things that reliably helps here, and it is one of the few things this course can safely hand you. Ask your doctor or midwife directly what is known about the cause in your case, including if the answer is that nothing is known. Not knowing, said out loud by somebody qualified, is easier to carry than a private theory in which you are the cause.