If you adjust a truss you usually need to adjust the trem height as well.

If you adjust the truss and the strings are laying flat on the fretboard, raise the trem.

If the neck did not have enough relief and you turned the truss rod clock wise, I believe you went the wrong way. If you remembered how far you turned it I would put it back there and reassemble it and tune it with the size strings you will be using and let it set a day and then reassess the situation. I have many guitars and have bought many, every time I get one in a shipping box and unpack it right away and try to make adjustments I end up having to re do them when the guitar gets adjusted to the temp, humidity, string pressure, etc. not saying this is your case but normally guitars are playable when they leave the factory. I would think they would have adjusted that if it was doing that before it shipped.

I have also noticed that, about it taking some time getting used to its new home. I bought 2 last week, a soloist and an rrxmg,, and both of them were different a couple of days after I got them than they were the day they arrived. ive also noticed that when changing strings, especially if I change string size, it takes a day or two to get where its going to be.

paranoid is right about the truss rod. clockwise (from either end that its adjusted) is going to make buzzy strings worse.

also, in my experience (which is limited compared to these other guys here) a quarter turn on a truss rod is a LARGE adjustment. when ive wanted to reduce or increase relief ive just barely bumped it. then the next day I check it and adjust more or leave it.

Really the strategy here should be to first measure just the relief after each adjustment, not so much the "string buzz". Do some searches on this. It basically involves using the outer strings as straight edges.

definitely. I just fret the low e at the first fret and the fret nearest the body, then see what the clearance is in the middle when I want to see my relief. I like paranoids idea of putting it back where it was if he kept track of how much he turned it

ive got one that has a crazy amount of relief but im scared to even attempt to mess with the rod. (its a 1959 Gibson),, but it plays great

This x1000. Never adjust a guitar the day you get it unless you're in the same climate that it was purchased in (i.e. bought from a local shop).
If it was shipped to you and it crossed a mountain range worth mentioning (Rockies, Smokies, etc) or more than 2 States in either direction, let it sit in the case or on a stand/hanger for at least 48 hours before adjusting anything, even the tuning. Let it do its thang.

I need to make a chart for this sort of thing, actually, but for example, since you're in Pennsylvania, if a guitar is shipped to you from St Louis, let it sit for 2 days. If it's shipped to you from California, let it sit for 7 days. If it comes from Texas, let it sit for 5 days. If it comes from southern Florida, let it sit for a week due to the humidity. If it comes from central Florida, give it 4 days. If it comes from north Florida, let it sit for 3 days. If it comes from Washington State/Pacific Northwest, or southwestern Canada, let it sit for at least 5 days.
If you get a tracking number, track it daily to see where it is currently and check the weather for that area; if it crosses a frontal boundary, add 1 day of rest.

I've bought guitars from all over the country over the years, and wasted days on end trying to unfuck bad Day-1 tweaks that I could have avoided otherwise. Once I started paying attention to the climates they came from, it all made sense and I came up with those basic rules of thumb. Since then, I've not had a bad guitar that wasn't a dog to begin with, and those who've bought from me and heeded that advice became believers.

Put it back like you found it, string it up, and let it rest.

Unless you bought it local, in which case, take it back.