Pregnancy test question please help

11 DPO and feel pregnant, I went pee as soon as I woke up I couldn’t hold it & went to the store to buy a test and tried to pee again like 45 min later it was JUST enough to get the stick wet & BFN (MAYBE A FAINT LINE) could It have been because It wasn’t FIRST morning urine???? I had a sip of milk bF testing