had that happen to me in front of my mum lol.. my gf was sitting in front of my pc using mozilla i think and i don't ever use it.. or haven't for ages and it was just a backup browser for when something wont work on opera..
so she went on typing "you...." to the address bar and the first suggestion she clicked it.. guess what it was.. pron site.. lol. i couldn't even remember when i had it open or why x[ i dont actually like that site lol or liked more like..
anyway she just laughed and was ok with it.. my mum did the same thank god.
then again i have shared some pics on facebook of hot girls and she said she felt like i was cheating on her by sharing them pics - even tho it was my sites fan page with cars and girls.. x[ and it nearly got so far that she wanted to break up with me
now about you.. i think you should give her time.. i bet 99% she will chat with her gf's and see what they say.. they will probably say you're sick and stuff but every guy does that we are born this way so she just has to release.. no be clever prove her in one long text that you actually love her and she is really attractive to you, you can even lie i mean it isn't a bad lie you are trying to save the relationship so do it but do it properly don't go ever the top..
now women are very strange creatures trust me.. my gf for e.g. wanted to dump me because i played with my phone(haha) for 2hrs when she was at my place and she felt ignored.. talk about over reacting? yours seems to be overreacting too so give her time, think about it and put something very clever and very sweet into a text message and remove all of it and say sorry once again
it might work or it might not.. she seems chatty after all and likes to express her feelings towards things so its a plus.. mine for e.g just stops talking for a day or two..
best of luck mate i know how hard it can be :]