It is likely that the eyelash has bothered you and incited an allergic reaction
too. It is likely to subside in a day or two. You can put lubricating eye drops such as refresh tears for a soothening effect. In case it is a pink eye , it will begin to water, become red or pink, cause discomfort. Viral conjunctivitis
is the most common form of pink eye and yes , it is very contagious.However it is self limiting and will gradually disappear with a week or two. But the likelihood of an allergic reaction seems more likely in your case.