you should def call her, even though its 2011 texts do randomly get lost, happens to me all the time. Lets say she didnt get it she would def be to embarresed to contact you after what happened. Id even call her today whats the big deal, this is from the weekend of the 5,6,7? if im reading your post right, you got nothing to lose, i would just ask if she got your text..
Lovely beach bikini babe!.
And I think your anxiety is a sign of a deeper fear, issue, perhaps of failing or being dumped, abandoment, etc. Perhaps see a therapist about this before you push her away..