How many DPO were you before your BFP with FRER


Hey everyone we BD’d right on ovulation this month. I usually have really strong progesterone symptoms- extremely sore boobs, really tired etc. this month I’ve had non of these symptoms which is very unusual for me. The only thing I’ve noticed is lots of creamy CM? I’m 8DPO and I only have 2 FRER tests and lots of internet cheapies. I’ll do a FRER the day before expected period (5th Feb) but wondering how many DPO I should do the FRER? 11/12? When did you get your BPF