Am currently on the platinum challenge which is ending on April 30th.

Unfortunately, I fell quite sick the last 2 weeks and had to cancel some stays originally planned over the last 2 wkends. I am short of 3 stays now and can do 27th/28th/29th April (different properties). Anyone knows if there will be any issues if I am checking out of my 9th stay on 30th April? Also would check in on 30th April and check out 1st May count towards the challenge since I am technically staying on 30th night (this is better than 3 back to back stays but I am not sure if I am taking a big risk for it not counting towards the challenge)?