Sudden eye pain and cloudy vision

Today my right eye itched for some reason. Then slowly my eye starting hurting and my vision starting being cloudy on and off. It's become worse, it's like there's a veil of grey covering my right eye. The eye hurts, but not overly so, it's more of an ache. If I move my head down it hurts more. The eye is a bit pink on one side. Also the eye is producing a lot of green mucus. What is this? It's freaking me out :/ Tweet