Please take a read through the "unhealthy fish" sticky and provide as much information as you are able.
Please provide details. Saying ammonia and pH is fine isnt helpful as we no way of knowing what you consider fine. Nitrite and nitrate are also important to know.
On the face of it you are unlikely to be cycled. Running a tank for a week wont cycle the tank, and then getting the water checked won't tell you anything as it has never had anything living in there to produce waste. All you are testing is tap water.
So you need to cycle the tank.
What do understand about the nitrogen cycle and how to cycle the tank?