Dose it back up. I would say for the first week check the ammonia every two days and then dose back up to 4ppm. The second week you can start checking it daily if you like and by the end of the second keep an eye out for trites. No need to test nitrates that soon as they typically won't even register unless you adding some seeding material from another established tank. hang in there you may have about a month or more to go, just keep posting your test results and have patience.
P.S. prepare to be frustrated with the time, delay in trites showing up and the delay in trates showing up but once they do it's exciting. Good luck.