Yes your fast is valid, but you should take your ghusl as soon as possible so that you should not miss the fajr salah.

I had sex with my wife at night in the Holy month of ramadhan saying I’ll take ghusul bath early morning before Fajr, only to overslept and wake up after Fajr,is my fasting valid?

Fasting | June 10, 2017 3:21 pm
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i was expecting menstruation and having whitish secretions since yesterday. now 1 hour before iftar when to make ablution again i went washroom and checked the secretions got slightly pinkish (red+white) no actual blood drops. since its only 1 hour before iftar what is best to do? continue fastIng plus also make up for this fast later or will this fast be valid and counted?
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My father In law has dementia he now has an iq of a 3 year old..obviously he cannot fast my question is do we need to give fidya of his missed fasts?