Can't log in just goes back to blank

I’ve been using WordPress all morning, but I started to have a few issues. First of all it was returning an error message when I was trying to upload some images to the library. Then I wanted to finally go live with my site so I clicked on the go live link and nothing happened. I then decided to try clearing my browsing data/cache etc and since then I haven’t been able to get back into WordPress. On the login screen I type in the correct password but then it just jumps back to a blank admin screen again. I’ve tried this on both Chrome and Safari and have the same problem. Currently banging my head against a brick wall so help will be much appreciated!