Re: The more you accomodate the more you have to give....
Zash - I don't get it. Why are you sleeping in the same room? I know you mentioned she is scared but still you need to find ways to make your mom comfortable and feel secure and she must learn to be in her own room.
Who else lives with you? Where is your dad? or other siblings?
It is obvious that your mom is suffering from some panic attacks if she feels the need to call you home even if its thunderstorm out there.
What you can do is - try and "be there for her over the phone". Tell her that she will be fine. See if you can make small arrangements for someone to come visit with her if you are not there.
The fact that your mom feels that she can call you anytime - and the fact that you will be there any time - is not going to help you in anyways in this situation.
It seems your mom is "lonely" and is seeking "comfort" by pulling in "attention" as a main source to keep you near her.
By the way how old are you?