Congratulations on your new pair, and welcome to Talk Budgies!
It's possible that your newcomers have taken a little water while you weren't looking, but yes, sometimes they do go a scary amount of time without when they're brought into a new environment. If you haven't already, I'd recommend setting some soft music or playing budgie song off YouTube so they have background noise, since quiet=danger to a budgie, and covering three sides of the cage so they can feel more protected and secure. Even though they were in a glass enclosure at the store, they will be more comfortable if they don't feel out in the open and vulnerable.
Similarly, if you aren't already, give them plenty of space. I totally know how tempting it is to want to gaze at their cuteness! But for now, leave them alone as much as possible so they can adjust. I'm sure others will be along with good advice — this forum has such helpful members! Take some time to read through the stickies. There's so much good information here!
Hey thanks for replying! I actually have been playing a YouTube of budgies singing for them and it definitely makes a difference as they do perk up a bit when it's on. I also just finished covering two side of the cage for them so I guess I am doing all I can! Lol
Definitely tempting to gaze but I am limiting my time around the cage to just feeding/ cleanings, mostly just trying to leave them be!