Yes you should have had an internal to see if you were "not progressing" before the decision was made to start Syntocinon. Once your waters have being artifically ruptured they usally like to start the drip within a few hrs if nothing appears to be happening or if they need the baby to be born sooner (ie if its distressed) but you should have had an internal if you were having regular painful contractions that had being increasing in duration and intensity since your waters were broken.