Your mother sounds like an immature personality, who needs to be the center of attention, who always thinks about her first and when the whole world does the same she thinks that it's only right.
I guess you have always been a good daughter. never questioning if what you did was right or wrong, was reciprocated or not.
I guess this is your chance to rethink your relationship with your mother. I woulnd't bother about calling her or not calling her right now, but I really feel like you have to see your mother's behavior thru other eyes and then rethink your relationship.
How about seeing a counsellor or a psychological help?

Your mother is probably waiting for you to apologize but you must decide what you want to do.
On the other hand, see what she does with her doctors. She may be back, when she need you.

Take good care of you. Think about your new family.