I feel exactly like you, I too think I would have been happy just to have girls. My brother has 3 daughters, his third came along when I fell pregnant with my first, alot of the family were hoping I'd even it out a bit with a boy but I completely elated when my daughter was born. My son came as such a shock (we didn't find out the sex until he was born) I truly was convinced I was having BG # 2. The morning after he was born he just had to look into my eyes and I fell completely in love with him, he's such a beautiful boy and I wouldn't trade my pair for anything. However with saying that the desire for another daughter has never left me. I don't know whether its the desire for my DD to have the sister I never had and I always longed for, like I'm living through her or the fact that her being my first I didn't realise how quickly they grow so I didn't really take it all in, like you said to replay the experience of your 1st DD again.
I'm pregnant again and due at the start of Nov. This time I had a boy vibe early on I guess, my DH and I agreed to once again wait for a surprise delivery but last week at my Doc's apt, I'm 95% convinced I could clearly see boy parts when my OB had a quick scan. I didn't acknowledge it even after my OB prompted if I had wanted to know, giving me more reason to think he could see clear as day what I had seen. Ever since I have felt so flat, firstly that I'm fairly cetain I know what we are having and I told my DH this and he still didn't want to know so I feel like I'm now carrying the burden of 'the secret' trying not to let it slip...I really didn't want to find like this. Secondly I'm 100% positive this will be my last child, I always wanted 3 and thats that. I'm not disappointed I'm having another son, I've already thought in my head of a name I love for him, I could def see another little boy running around with my son (they will be 19mths apart) but again the thought of never having another baby girl in my arms makes me really sad. Even today I was putting away clothes in my DD's wardrobe and I saw the bags of pink clothes she's outgrown. I had a quick glance at some and wanted to cry, its really bothering me and like you not sure how to shake it. I should be over the moon, I have 2 happy and healthly kids, another on the way, some people would give anything to even have children let alone both sexes already. I hate that I feel this way and aren't completely overjoyed with completing my family.