This query is set to pick only post made from seven days ago. You might want to try it to cut the hassle of checking posts later than time frame. Best to use a PC except your phone has a ram greater that 3gb. All the best.
Also note that this is set to start picking post seven days ago and I believe you'd want to use it immediately. But if you want to use it t a later time like tomorrow, you let of know so I can re-calculate the time frame.