Private media?!

I am using the theme “Fullscreen” and my website is adriennemcnellis.com.

I have been trying to upload the photos that are displayed on the homepage. [on the top and the bottom]. I was successful with uploading for about ten minutes, but a few of the photos looked distorted and I was trying to fix it, so I’d delete the photos and try a different photo. Then all of the sudden, my photos were not being shown. I was getting a clear box with a small blue x in the middle. [I use Safari if that means anything.] and then I’d click on the box and it would send me to a different page and it would say, Private: Media>> then the name of the photo.

I am not well versed, scratch that, I am not versed in anything that has to do with websites. I just switched over today and I’m so frustrated, I’m about to throw my computer out the window.

Please help!