Is this a pollen bag???

It does look like a little sack and it looks to be open as well with its anthers showing. This likely means the tent will now be growing seeds. :( I have had this happen to me recently. I am trying to figure out if my tent has any light leaks and its only one plant close to the zipper door and I feel that might have been the issue. If its just a few, pluck em off with wet fingers and toss out. if there are lots the plant it won't matter how many you remove the plant hermiied and will keep trying to make more. Isolate it from other plants if there are any, Good Luck!