I really think you will be fine.... with or without preseed. Just BD around your fertile period! Preseed is said to preserve the swimmers by creating a super sperm friendly lube environment that leads them directly up the path to the tubes, since the lube is internal and used with disposable syringes. I got pregnant with #1 without preseed or anything.... I just used it this past month because all the BD'ing was getting uncomfortable without the extra "help"!