Severe lower back pain and sudden blurry vision (20 Male)

So I woke up this morning and I felt fine I went about my day and after breakfast I got back in bed and watched tv. After getting up to go the store I noticed I had some back pain. It wasn't bad until I went and tried to get in my car I felt the most severe sharp pain I've ever felt. So I went back inside but after that I had severe sharp pains if I bent my back even slightly. It got so bad at one point when I went to climb back in bed I was standing and struggling to get back in bed I started to get dizzy and the scariest thing I've ever experienced occured my vision started to disappear. Eventually I couldn't see. It only came back once I laid down in bed. I had never been more terrified in my life. I'm only 20 years old. I've never had something like this happened. I'm starting to think I need to go to the ER someone please give me an idea of what happened.