This is also going to depend on whether you had a 3 or 5 day transfer. You will obviously have to wait less after a 5 day transfer, since the embryo will attach no later than the day after the transfer. Good luck :)
hi there .. I polled 7 days after transfer that I got my very faint first positive .. but I know plenty of people that didn't get a +ve on an hpt at all only to get a BFP at the BT so it's totally different for everyone. good luck!!!