Dark Ball on Inside of Upper Eyelid

Recently I noticed that my right eyelid is slightly puffy. I am a contact lens wearer, but have not been wearing them for the past few weeks just to be safe. I had been feeling as if something were caught in my eye for days and had difficulty getting my contacts in. A few days later, an eyelash and some sort of fine, but slightly coarse fiber came out of my eye - I'm not sure how long either of these were lost in there, could have just been thirty seconds, but I did not feel anything go IN. As I was looking at my eye, I pulled back the corner of my right eyelid and discovered a dark, black-ish looking bump on the inside of my lid. It is not visible from the outside, as it tucks a little bit into my skull, if you know what I mean. But when I stretch my eyelid (see picture below), it is very apparent. I have googled this to DEATH and cannot find anything. I have had a chalazion in the past and know that they can be very tender and sensitive. They also tend to be whiteish in color due to pus build-up. This bump is dark and does not hurt at all. It is just a little bothersome and curious. I am going to the opthamologist within the next few weeks, but I was just curious what anyone thought this could be. Thank you. [/img]