Im really worried about my best friend and dont know what to do, can someone help me?

Me and my best friend, eevee, are very close, barring that she lives in pennsylvania and i in california.. She is like a sister to me almost and i have strong emotions for her.. I promised that i would come try to find her and protect her to the best of my abilities had anything panned out with the rapture hoopla yesterday that had her scared half-to-death. She normally txts me when she wakes up, it calms me down and helps me go to sleep, i suffer from insomnia. Except she hasnt gotten ahold of me in a few days after my roommate upset her on the phone. Im worried about her because her being slightly unstable. One of the last things i did say to her was that i loved her.. I have aspergers syndrome and i care for her alot and am stressing out because she isnt responding and i havent found anything to suggest that she is hurt.. What should i do?