Do I have a bowel obstruction risk if a c hyst?

Yes. Although the risk is small after any abdominal surgery, there is risk of intestinal obstruction due to formation of adhesions in the peritoneal cavity ( abdominal cavity ).
Maybe. Any abdominal surgery, even an appendectomy poses some long term risk of adhesion formation and possible bowel obstruction any time in the future. Of course the benefits of a needed surgery outweigh the risk of obstruction in nearly all cases.