I SO had the same thing happen with Coco. Although we had FOUR u/s , each time they said "we THINK it's a girl but can't be 100% sure", so I was not sure the entire time. I really wanted a "coco" so would've been upset if she'd comeout someone else, but I guess deep down I knew it was a girl the whole time anyway, had the same feeling with Tilly and didn't find out with her.
I would say it's definitely a boy for you Danni, generally they don't say maybe unless they're totally sure, because people these days sue! Good luck, not long to go!!! xoxo