CD 46 no sign of AF faint bfp but negative FRER

Sierra

I have had irregular cycles since I miscarried in January. Last two cycles were 45 & 31 days. Yesterday I took an answers tests from Family Dollar and received a very faint bfp. Took the 2nd Answers test with fmu and got another faint bfp which is darker than last night's test. Today is cycle day 47 and I took a FRER with 2nd morning urine and it's negative....wondering if anyone has experienced anything similar and if I was pregnant wouldn't the FRER be positive!?!?

Picture is taken 10 mins after testing.