I had something similar last year. My optician said it I had got something in my eyes that I was allergic to, and because I was wearing Night and Day lenses the allergen had stayed in my eyes and made it worse. He advised me not to wear any contact lenses until it cleared up (which took a few weeks) and to use Opticrom eye drops. They really helped, and if my eyes start to feel itchy or uncomfortable I put one or two drops in. This might work for you and ease the swelling.