Yes, you just pulled pollen sacs that had not yet fully developed. Had you left them on there, they would have begun to open up like a flower and release large amounts of pollen. Your buds are very small & undeveloped, too. What week are you on? Are they getting enough light during 12 hours on (HPS?) and are they completely dark during the 12 hour dark period? A lot of beginners do not put their plants in 100% darkness, and it is this leak of light during that period that causes them to hermie, as well as go undeveloped and yield low.
My recommendation would be to pull pollen sacs & banana pistols on the buds if/when they develop, and keep them going as long as you can without serious seed production. This can happen quick tho, so moniter them and keep a close eye. When they have reached the peak weight/potency you feel you have, then pull them and smoke what you can, or if the seeds or lack of potency become too much of a hassle, just make hash or hash oil out of your final product and buy a sac of some dank to smoke it with and enjoy the earthshaking headhigh hash can bring to the table!
Hope this helps brotha! Best of luck, and I hope you have better luck with whatever new seeds you end up purchasing in the future! Investing in top of the line strains/genetics is the best way to start growing for the long run and putting out quality, medical-grade medicine!
Cheers!
+rep???
Mazar