... it invalidates your fast.
If a person intends to break the fast when he is fasting, whether he is certain about that or is hesitant, then he does not find anything with which to break his fast and he changes his mind again, he has broken his fast and he has to make up that day. This is the view of the Maalikis and Hanbalis, but not the Hanafis and Shaafa’is. See: Badaa’i’ al-Sanaa’i’ (2/92); Haashiyat al-Dasooqi (1/528); al-Majmoo’ (6/313); Kashshaaf al-Qinaa’ (2/316).
If a person intends to break the fast when he is fasting, whether he is certain about that or is hesitant, then he does not find anything with which to break his fast and he changes his mind again, he has broken his fast and he has to make up that day. This is the view of the Maalikis and Hanbalis, but not the Hanafis and Shaafa’is. See: Badaa’i’ al-Sanaa’i’ (2/92); Haashiyat al-Dasooqi (1/528); al-Majmoo’ (6/313); Kashshaaf al-Qinaa’ (2/316).