Is my rabbit pregnant?

got two female rabbits (one netherland dwarf and one holland lop, prebonded and sent to a rescue after their previous owner had dropped them off and left the country.) from a pet rescue maybe two weeks ago, my Netherland dwarf (juniper) in the photos has been digging PROFUSELY and searching around sheltered areas, digging everywhere she can get her little paws into, and just today shes started to collect hay and place it all behind their litter box. she’s been pulling out fur from her and her friend, dragging over fleeces and being a tad bit irritable. they were both housed near two males so I’m not sure if that has to do with anything and they’re both unspayed. can anyone help me with what’s going on? if shes pregnant I need to be able to make sure she’s alright, thanks! (please excuse the mess in the photos, we don’t want to disturb them with cleaning yet.)