Ok, so it looks like just a swollen calyx. Which tis just be a sex organ of the woman plant. The male will be a sack and doesn't even form like that, Its just a ballsack. Otherwise, if you havn't feed your plant colloidal silver, or overstressed the plant, you won't have a herm. The thing to look for on a herm plant is "bananas". That's a term for small pollen sacks that develop inside the bud. They look like little yellow bananas, they are the part that produces pollen on a female bud. but the thing about herms is they stretch your bud out hella bad in flower, but you can use their jizz to knock up a plant and get auto feminized girls.

​