Stitch came out one month after surgery.?

I got my gallbladder take out laproscopicaly on April 29th this year. On the bottom incision there was a piece of dead skin... so i tried to pull it off, as i was pulling it of i felt a sharp pain... i looked at it and it was a small stitch! I was told the only stitching was dissolvable and on the inside. So as i type with one hand the other is trying to stop the bleeding. There's a small hole where the stitch was... and it hurts kinda bad. I told my mom and she said she'll call my surgeon in the morning. Has this ever happened to anyone and is it okay??