It could be viral conjunctivitis
but the fact that you are a contact lens
werarer & have a history of falling asleep with your CL on, I would like to rule out Contact lens induced red eye(CLARE) and Corneal infection
You've mentioned pain and intolerance to light which suggests there might be some corneal involvement ( could be only CL induced red eye which would resolve with steroid
drops and tear substitutes or corneal infection which needs investigation & treatment of the specific organism).
Hope you have seen your ophthalmologist by now.
Till then discontinue your CL and keep instilling a tear substitut like Refresh liqugel every hour.