U sound like me just before my 19wk scan. My DH didn't want to find out and i was happy with that but then i changed my mind and really wanted to know cause im the impatient one and want to have everything ready (if it was a girl i wanted to get girly things, already have plenty of boy things). So we changed our mind while in having the scan... We spent most of the time during the scan saying to each other 'u decide, no u decide!' in the end i said to him i'm carrying the baby so he can decide if we find out or not! The lady doing the scan thought we were funny and settled it for us by telling us we're having another little man. If we go for a 3rd i think we will leave it as a surprise as u said being the last time it would be nice to do things differently and have a surprise. It is a hard decision whether to find out or not cause once u do u can't just 'forget' it!
Also DH asked if she could write down the sex but she said she's not allowed to but can just tell me and not him... Don't know why that is... If u can get them to write it down for u maybe u could do that and put it away til u decided if u want to know or not. Do u have any feelings of what sex bubs may be? I had a feeling i was carrying another boy even tho this pregnancy is completely different to my first.
Good luck!!