Could you please open the image once in Photoshop and see if it still shows blurry.
Also please export the image once without checking the option " Resize to Fit ".
oh my lanta thank you so so so so much! that worked!
You are Welcome, I would request you to please close this discussion by marking the answer correct.
Alexandra, since you appear to be using a retina MacBook Pro, you might want to look at this recent thread too: Problems with low res/compressed exports of Lightroom images there is a tip there to change the preferences in preview.app that will make it show you the image correctly as the blurriness is due to the way images are displayed on retina screens by default and by the fact that you exported at a extremely small image size as already noted.