Yea them sacs buddy and it looks like there towards the top of the plant which means there's a possibility that it will pollinate your entire plant, if the sacs were more so at the bottom the pollin would usually fall down to the lower end of the plant and your upper colas would have a better chance of not gettin pollinated. It's happen to me before and a bunch of growers, just try to keep stress way down next time round and for sure you'll have better luck. Also I've grown hermie seeds before and with no stress meaning light leaks, hst, and even lst etc. I have had really good succses.