To all of you TTC!! very early positive pregnancy test!!?

I finally got my positive preganct test yesterday!! Matter of fact, I had a positive result on 7 dpo!!! I know that this is correct because I charted BBT's and used ovulation predicter kits. Using the early pregnancy test from target brand!! Also, wanted to let you all know, I used Tussin (dollar tree robitussin) (just tussin, not DM), 2 days before my fertile cycle started and through out my fertile days until the day after ovulation. I am not sure if this is what did the trick, but I have been ttc for 8 months know. Good luck to all of you and lots of baby dust to you*********