You definitely need to wait a bit to be sure. I agree it does look to be male but might as well wait another week and be sure as opposed to accidentally throw a fem out.
Definitely wait at least a week and within that time get yourself a jewelers loop or some sort of magnifying glass so that you can be for sure. I had a female plant on a previous grow that I swore was a male because it had swollen sacks like in one of your pictures...waited a week and turn out it was a female.