I did this test this morning, either 14 dpo or 11 as not 100% sure when I ovulated. The tests are the really cheap ones off amazon where you get 20 for £5 so not sure how reliable they are. Though I have used them before and got stone cold negative which was accurate for those months.
This line came up within about 2 minutes, not fmu (about third wee of the day!).
Does it look positive?