Thank you so much Dreaming and SSW for your Ramzi guesses I couldn't take it anymore and went for a private scan today at 16w3d. The tech could tell immediately after getting him to uncross his legs. It was so obvious that I could tell before she said anything. It was so easy posting a toilet shot of DD2, but now that a penis is involved, I suddenly feel like a pervert, lol.
The second picture is a 4D shot of him sucking his thumb. I'm not posting this in the ultrasound forum because I don't want to take away from people who need guesses. This also makes Intelligender 4-for-4 in my case, with two correct results from this pregnancy and last. I'll put up some of my symptoms for fun in another post.