Wisdom tooth clot opens?

Just wondering, I recently got my wisdom teeth removed and everything is healing fine. It has been about 4 days and the sockets were able to clot the first day. However, I just discovered that one of the sockets have opened (probably from eating) so I am going to see my dentist tomorrow. I was just wondering if this is still considered a dry socket or what it would be and what I would need to do other then whatever my dentist says. Also, the wound hasn't started hurting which makes me think that it is still going to be alright...but it is obvious that the hole is there so I was curious...