I also used to wear contacts a lot, when I started using them I was told to take them out before I went to sleep so I tried to do it. Most of the times I did but on ocassions I forgot (happened couple of times when I had been drinking those evenings). One time I woke up, came to think that I had my contacts on the night before but they were gone in the morning! Nowhere to be found and I was really worried they had somehow gotten behind my eyes or something ;). To this day I don’t know what happened to them. Anyway, good that you remember to do it now!