I will come forward and dare to say that "Will + Present Perfect constructions" can convey actions in the past. It's not my personal opinion. Look at these examples found on the Internet.
1) CRC is able to help homeowners when CRC owns their mortgage. If CRC is the owner of your mortgage, you will have received a notification from us, informing you of this and introducing you to our team. If you didn’t see this notice, please check and see if Wingspan Portfolio Advisors is the servicer of your mortgage.
2) If you follow my facebook or twitter you will have known that i recently had an exhibition.
3) If you've played Alien Wars and Contra Force than you will have known that sometimes there are view changes in these games.
The reason why your original sentence doesn't sound like talking about the past is because of "in almost a week", I suppose.
However, will++ Present Perfect constructions means something like "You are very likely to have done something".