Answered by Shaykh Faraz Rabbani
Can you break your prayer if you have not started saying the Fatiha yet?
Assalamu alaikum wa rahmatullah,
In general, once you begin an act of worship you have the duty to complete it; and only a strong reasons (such as fear of harm, for oneself or others) allow breaking the prayer. (Shurunbulali, Maraqi al-Falah)
Jazakum Allah khayr.
And Allah alone gives success.