Thumb and index finger injured, vision blurred, dizziness after an accident. Normal?

I just hit my hand not too long ago by accident on the corner of the wall. It was right in between the thumb and index finger . I touched it after and it hurt like crazy, so I was going to go call my father and suddenly my vision went blurry. My hearing became muffled and I was stumbling around the place like a fool, collapsing once or twice as I tried to make it to the bathroom since I felt like I needed to throw up. Right after, I went to stand up and almost collapsed again. I m back to normal now, but I d like to know what I could ve possibly done to my hand. It s not pain to the point of not being able to use it, but it hurts when I move my thumb back.