OH! Had no idea they were so you and new to you! They sound nervous, my bun when I first got him all of 3 months ago would do the breathing fast thing as well, which I think made him look to be shaking.. I think your OK as long as they are eating and drinking water..
I remember how scarey it was in the begining.. So if they like nose rubs, give it to them, if their skittish - give them some space to get used to their new enviorement..
Are they sibblings? Are they in the same cage?Are they seperate sexes or the same? And YES photos and Video would be fantastic! But I think they are just nervous..