Oaths & Vows

Q: I took a vow saying Wallahi I will not drink a certain drink, then I was opening the can of drink for my friend and some drink fell on my hand and I forgetting my promise licked the drink off. Do I need to make kaffarah for breaking oath in Allah's name? If one breaks a promise taken in Allah's name I understand they must keep 3 fasts, do they have to be all consecutive?

Q: Can I make a vow to fast for 1 week for the pleasure of Allah and in return ask Allah for the recovery of my mother in-law who is currently very sick? She will be going for liver biopsy on Monday morning and I want to fast so that Allah can make it easy for her and make her results negative. An urgent reply will be highly appreciated.

Q: If a person verbally makes a promise to Allah and to the person they want to show their commitment to, the promise being that I will stay away from such and such haraam action forever, what happens if such a person continually breaks such a promise? Secondly is it permissible for the other party to be suspicious that maybe the person taking the promise is breaking such a promise?

Q: It is narrated from the Prophet (blessings and peace of Allah be upon him) that he said: “Whoever swears (if he does something or fails to do something) that he will follow a religion other than Islam, falsely and deliberately, then he is as he said, and if he meant what he said, he will never come back to Islam with his faith intact.” My question is if a person swears to Allah that he will never do a particular act and if he does it he will die a kafir. If he breaks his oath will he die as a kafir?