are common causes of conjunctivitis. Some viral conjunctivitis involve the adjacent cornea
making it keratoconjunctivitis
. A s from the history you have quoted and treatment given by various doctors you are having viral keratoconjunctivitis. The treatment of the condition will take more time ans some times upto 3 months.
The treatment which you are using currently seems appropriate. Continue the same treatment and attend follow up as advised by your eye doctor.