I would follow the method on here rather than Dr Tim's. TwoTankAmin wrote it so that if followed exactly, nitrite can never get high enough to stall the cycle. I would leave it for now, but don't add more ammonia till you reach the next stage in our method.
Test every second day until you reach a time when ammonia is zero, then zero again 2 days later. When you have those two zeros, add enough ammonia to get 1 ppm not 3.
Once the 1 ppm dose it added, test every day until you reach a day where ammonia is less than 0.25 and nitrite is less than 1 ppm. If ammonia drops wait until nitrite has also dropped. When you get to this stage tell us and we'll go on from there.