Photos won't upload

Photos will not upload. Everytime I go to upload a new picture in media, I click the file and everything seems to run smoothly. The bar reaches 100% until the photo is fully “uploaded”. Once I go to edit the picture however, I am met with a blank photo with an icon indicating that the picture did not upload correctly where the picture is supposed to be. As I am a new user to Word Press, I am not very advanced and am finding out new things every time I use it. I made my website 4 days ago, and plan on running a blog that vitally needs pictures. Please someone help, I hope this is a simple fix.