Yeah, I can't even orient that picture to figure out what I am looking at. Given how close you are to your anatomy scan, I am guessing you are at least 15 weeks or so...so generally a penis is fairly obvious at this point. Although, like I said, the orientation is confusing and I can't tell what is going on in that pic. Hopefully you get a more conclusive pic at your anatomy scan!
EDIT: Duh, you said you were almost 17 weeks. I see the way the pic is taken now, after staring at it for a while. And even though the pic is very clear of the front shot, it is so hard to tell gender from a face-shot. I see the area you are looking at...but I can't tell if that is a penis or not. Too bad you did not have a tech who would tell you

I guess you will find out soon enough.