If you can’t remember, then this is valid for voluntary fasting only!

Please can you advise if I cannot remember my exact intention the night before fasting which I had wanted to be to fast arafah with combined intention to make up my ramadan fast, will this fast still be accepted for both or do I have to repeat?

Fasting | September 25, 2015 3:25 am
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I have some fard fast left which I have to keep.So if I keep the fast of arafah it will b compensated for my fard fast or be counted as arafah roza?
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When one is fasting Fardh and midday experiences menstruation; is she allowed to eat at that moment or must she wait till Maghreb even though the fast is invalid? What if it is nawafil fast like Thursday and Monday fast? Can she eat when the fast is invalidated by menstrual blood ?