ugh, I know this feeling all too well. I have lost lots of sleep whenever my girl cries/yelps until I learned not all of it was from pain or injury but from not getting what she wanted or she's begging. Funny thing is my Dad has gotten to do the same thing as well. We both would get up/wake up to check on her when we think she hurt herself, cause she's such a dainty drama queen, it doesn't really take much (I petted her firmly when i first got her and she yelped in "pain" ;_; ..) She's better about being tender/sensitive now, but still it don't take much for her to get upset over something when it doesn't go her way X_x She's a very sweet girl, but get in the way of her having her treat (while she has it) and she turns into a little devil
Good thing she's not so bad when it's something that isn't suppose to be a treat (like random papers, plastic or other things she somehow manages to get into her mouth >_<)
Interesting thing is at 6 months and being the size of my smaller/older jack russell (who's almost smaller than her), she's not big on jumping off the couch even though she's big enough now (she's had a traumatic experience or two before as a baby, but mostly just falling over on herself on a few inches X_x) so she usually whines/cries for someone to take her down. If there's a pile of blankets or cushion she'll jump down on that, but otherwise she's very hesitant. Every so often she'll get down herself, but mostly wants someone to help. Same thing with getting up on the couch, she's big enough to jump, but doesn't seem to know how to jump up or is too afraid to. Thinking to get her some stairs and when it's warmer take her to an agility park to help her learn to jump up and down.