..but be cautious. I did my first one at 4dp5dt (4 days post 5 day transfer) and got a faint line; another one on day 5 looked a teeny tiny bit darker... but I had twins. LOTS of people don't see anything until several days later, especially if you had a single transfer, so please don't make yourself crazy if you don't see that line!! When's your beta?
For a 3-day transfer, there's no way you'd see it yet! Remember, the blastocyst won't even hatch until about day 6 after fertilization (so 3 days after your transfer) and then implantation doesn't typically occur for another 24-72 hours. Even AFTER implantation, it would take a few days to register on an HPT. So, it's theoretically possible you're getting implantation around now, but it's still really, really early. I'd wait until Sunday or Monday to try again! Good luck!
I hope no one is sick of my hpt story yet (pg ment)
June 28 2012, 9:18 PM
I peed on an embarrassing number of sticks and they were all snow white, day after day. Finally afternoon of 7dp5dt I got a light line on a CVS blue || test. My beta two days later was 51. Three days after that, 186. I had twins on board who stayed neck and neck with each other through the pregnancy.