Anytime you get a positive PG test you should check with the doctor and go in. I had a BFP on DPO 9 using FRER and first morning urine. I took one later in the day and got a BFN. Went into the doctors office and took a pee test and got a BFN-yes at the doctors office. BUT took a blood test and it came back BFP and resulted in baby girl. FRER if not used first thing are not reliable unless using first thing. Plus I was about to get on progesterone by DPO 11 which I am convinced kept my little one growing after I had to miscarriages.