I would definately recommend getting a test kit, its much better to test yourself as and when. Your tank isnt finished cycling yet, you need to add ammonia up to 4-5 ppm (this is where a personal test kit is handy) then wait for it to fall back to 0-1ppm, add more to 4-5ppm etc until it drops to 0 ammonia and 0 nitrites in 12 hours or less.
Ash