Yes its the resin the plant is extruding. Try not to touch the buds too much. And it appears the pollen sack ur talking about is just a swollen calyx. Calyxes are what make up a bud and the swell up and grow ontop of eachother until a beautiful nuggy is formed
If that's a seed developing and that's your only plant, then yes. I don't see any pollen sacs in that picture, but that doesn't mean they didnt develop elsewhere.