My DD did this almost 100% of the time when we were anywhere but home until I got pregnant (she was 2.) I used to not mind it so much before then, but because she was/is over 30 lbs., I just got soooo tired carrying her around with me when we were shopping etc. that I HAD to start insisting she walk next to me (she never did the stroller thing - I'm assuming that's not an option for you, either?) when it just got too exhausting. It took a few outings before she stopped asking (she never had a meltdown, just would keep asking at first), but soon she just got used to walking when just she and I were out together. She is VERY shy and still asks to be picked up whenever anyone (even much smaller kids!) approaches her and/or speaks to her. If we are with my DH, she will insist on being picked up, but if she is with me, she knows I probably won't (unless, of course, she's hurt or crying or something) and just buries her head into me. She holds my hand most of the time we are out, but just recently has started walking alone (still right near me) at certain times (it seems to coincide with whether there are many people around us) and seems to really enjoy the newly-discovered independence. I wish I had better advice for you, but if she really seems to not be comfortable being put down and it truly upsets her, I would try to put up with it as long as possible, since I'm sure she will hit that independent stage soon enough be asking to walk, especially if she's seeing others toddlers doing the same, or I would just try to talk to her about how carrying her sometimes give your back a boo-boo and maybe she'll understand it enough to agree to walk when you can't handle it anymore. I don't know how well DD would've understood this (or cared!), though, if she had been 17 months, as opposed to 2, when I explained this to her. It's obviously very important that she feels secure while you are out, but you also need to take care of yourself and not wear yourself out, either. I think it's better to get her used to the idea of walking now (when you can blame it on your boo-boo back or being tired, NOT the baby itself) rather than when the new babe arrives, so as try to minimize any resentment regarding this particular issue. Good luck and I hope you find a solution very soon!