I think that (like what most of the others have said here) you should give her some space and let her come to you. Like everyone else has said, she may not have thought through what she's leaving behind exactly.
Also, it seems she's gone somewhere far away from you guys now, and being someone who's only known his Mum through a long distance relationship, in future don't neglect her. Do try and chat to her. I know it may sound silly to say this to you now Caitlin, but after all she is your Mum and isn't some cyborg without feelings, so I'll bet she'll be missing you terribly soon enough. Just make sure she knows you care about her? I think thats what I'm trying to say here. Ok ima stop rambling.
Always here to talk Caitlin if you need me.