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The wc brought your ph back up some & dropped your nitrites- good job! Yes, try dropping dose down 2ppm for a few days & let's see if your nitrite>nitrate bacteria can get up to speed.
Your numbers look good! Dont worry about leaving for a couple of days- if its not cycled when you leave, just dose the amm & it will be fine until you return.
Yes! It will be fine! I have experimented with my qt quite a bit (which I keep cycled with amm)- I have left it for 5-6 days with nothing & have never had an issue keeping it cycled. I have also helped others that left a tank for a month (or longer) and they were able to get their tanks back on track within a week or two (which even surprised me!). As long as your ph is fine before you leave (if not, wc before dosing), I wouldnt be worried.