What does it mean when your girlfriend doesnt tlak to you sometimes?

[MasterBrief]

Ok so I've been with my girlfriend for almost 3 months now and lately she sometimes wont answer her phone or reply to texts and I know that she is busy sometimes she has a lot going on. But just today, I didnt talk to her last night but today at 6 I talked to her through text for about 20 mins then at around 7 she got on msn and I tried to get a hold of her on there and she didnt respond she didnt respond to the texts to her phone either so then at nine I called and it sounded like she got my call and then didnt take it because usually it take 40 seconds to get to the voicemail and this was only like 20 if that means anything then I tried calling 3 times after about 10-15 mins apart and she didnt answer. Until about 10 she was on msn now Idk if she was at the computer or not but this is really getting at me cuz its not like shes ignoring me cuz we talk but then this happens and it makes me wonder. any help would be great.

[sacha.86]

she might just feel like u ring tx etc to much try not to wory and stop ringing her so much. Once or twice a day while u are not with each other is fine