I had a tooth extraction friday my stitches have started coming loose and has cause severe pain i'm out of the pain medication the dentist gave me?

Call your dentist: Call your dentist and let him\her know what's happening. He\she may want to see you again, but will certainly be able to help you resolve this issue.

Dry socket?: If the pain intensifies days after the extraction you may have this complication going. As suggested, go back to the dentist for evaluation and possible post-op care..