Husband telling the wife "I got no wasta"

Q: My husband touched the Quran in anger an said I got no wasta. He said he didn't mean it as divorce. Can you please tell me does that mean we are divorced? I've already paid kafara of feeding 20 poor people because he touched the Quran. An we been living like man an wife since. Please help me as I'm not comfortable. I pray five times and I don't want to live in sin for the rest of my life.

Witr Salaah

Q: I prayed witr salaah with three rakaats. Meaning, my witr is similar to magrib salaah but with a Surah and then duaa qunoot in the third rakaat. Is this the correct way of reading witr salaah?

Taking an oath in one's mind

Q: I have a question regarding oath. I have taken an oath. I cannot recall whether I uttered (said it verbally) the whole statement of the oath or the last few words of the oath and thought the rest in my mind. I cannot even recall whether I only moved my lips with no sound or I have made sound. In order to take an oath is it mandatory for the person to hear himself? Please advise if my is oath valid. Do I have to pay expedition for breaking this oath. I am really worried. Please advise.

Whistling ringtones

Q: Nowadays many new Samsung phones have a message tone of a person whistling in a tune

1) Is this considered the same as music and thus the person will be sinful?

2) What is mentioned in the hadith regarding whistling?