So many misogynistic assumptions underlying the responses to this thread, @PinkPomelo. I hope you'll overlook these.
Every action made by a pregnant or recently post-partum mum is not dictated by hormones. New mothers are not an irrational mass of unregulated hormones and are perfectly capable of making sane decisions. That you're married also does not mean relinquishing your own family name. If you're struggling to change your own name to that of your husband then the answer is quite simple: don't.
It's worth amending the paperwork to show your own name on your child's passport. I've had no issue with this personally, but judging by others' experience it helps to have your name on your child's passport if you need to leave the country without your partner.
My DH, I, and our DC all have different family names. DH has his, I have mine, and DC has the two, unhyphenated names. We are very much a family unit. Having my own identity doesn't make DH and me any less husband and wife, and DC knows exactly who his parents are.
You're not 'creating issues where there are none': if this is an issue, for you then it's an issue. It would be for me, too. What you will find, as indicated upthread, is that some women out there will go to every effort to put you back into what they see as your box.
Women's identities matter too. When we commit to one partner for life, we don't just 'disappear' - albeit patrilineal naming 'traditions' might make it seem so. The term 'maiden name', incidentally, is awful. Men simply have names which don't denote their sexual status.