Whoa.. you need to slow down. A typical tank takes about a month or longer to cycle. (Yes there are so called additives to speed up the process) but a little over a week to add fish? Not good. You might want to take fish back and have seller hold it for you. The first month to 6 weeks parameters are going to spike & change and adding fish to soon will likely kill them. Sorry to be the bearer of "ugly news" but research more and ask questions. Some fish stores will sell you anything just to make the sale, you're in good company here and members will help you on all fronts - the first one being slow down & be patient. The quote most here stand by is
"Nothing Good Happens Quickly in a Saltwater Tank"
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Okay... Your tank has not cycled completely then. . I am thinking you have nitrite levels in your tank if you are not picking up nitrates. I think adding 3 fish that quick is caused your ammonia spike. Get Dr Tims bacteria or equal..
If you know anyone that you could get some seeded live rock asap would help as well..
I rushed my 1st tank .. All of us has done that... good luck
I used biospora, I forgot to mentioned that and I also added some water from the old tank. Its not my first tank, so I though it would help to cycle faster

I really needed to move them to a different tank. I have live rocks but they are overrun by aiptasia so I would hate getting it into the new tank. I might just need to get one from my LFS tomorrow then, but I was hoping to avoid adding live rocks to my new tank.