How Many Days Did You Ise It and Got BFP?

Id be so thankful if you ladies could help me out. So me amd my husbamd have been ttc for abt 9 mnths now...we started taking On A Day Pre Ptegmamcy Couples Pack abt 2 weels ago...we used Pressed lastnight on my peak day....how many days did you use preseed. is it lilley i could still get ptegnant only one use of 4 g of preseed