Re: pregnant after vasectomy?
If you had sex on the 14th and that is what got you pregnant, a test wouldn't show positive until AT LEAST 10 days after, but more likely 12-16 days after. Even the early response ones. I hate to tell you, but it kind of sounds like what you're having is implantation bleeding. It starts anywhere from 4-7 days after intercourse, and can last for a day or even a few days. I always read that true implantation bleeding lasts only one day, but I have had it with both pregnancies for about 4-7 days.
I think your best bet is to take a test on August 28th. If that is negative, then you're probably pretty safe.
Good luck! I hope everything turns out how you want. Keep us posted!
Identical boys, Max and Jack born 3/19/05!