No, your plant is not showing its sex as yet.
Those growths in the pictures are new branches coming.
Yes, branches will have their own branches.
For an idea as to what to look for, go to week 7 in my diary "cannabis conundrums" where I have posted pictures of both male and female pre-flowers/primordia, as well as some hermaphrodite flowers. These pictures may give you an idea as to what to look out for once your plants start flowering or showing their sexual differentation.
And yes, bag seeds have a high chance of being hermaphrodite due to practically no one growing pure males these days.
Hope this helps, Organoman.