Me and my girlfriend have not talk for a week, should i ume its over?

The last time we spoke was on mlk day and everything was fine. 3 days later I texed her to see what she was up to and she only gave me a one word answer. Since then I haven't heard from her. I don't want to keep bugging her. On her myspace, she wrote she mean things addressin I don't know who and her mood says 'stressed. I really love this grl but it hurts me to feel like I'm buggin her everytime I try to talk to her. What do u think? Ps; we live far apart, so we don't see often , we text alot.