Dec 23, 2020 · Lottielou90. Although the average cycle is about 28 days long, some people have slightly longer or shorter cycles. Got a huge dip when I got my VVFL on dpo 10 and that freaked me out!! but then the temp just back 9 DPO is thereabouts the first day you'd be likely to get a BFP, so most people who were going to get a BFP would get a BFN at 9 DPO. 3pink is a lady that was on here and she tested ...