Well that sounds normal enough to me. I don't know anyone who has never done that.
What I mean is if the way you act is bad enough that someone thinks you need to be medicated, and you think you have bipolar, then maybe its something to consider working on. If I think something I am doing or the way I am acting is affecting those around me in a negative way, especially my child, I work on it. Everyone can admit to having something they need to work on. Therapists and medicine can work on helping you too, but the biggest part of getting as normal as possible has to be acheived by you and your will to get better.
Having bipolar isn't something that just isn't a big deal. If you have that, it affects everyone around you on a continual basis. Everyone gets frustrated, but bipolar people get "manic" - and for long periods of time, not just at a moments frustration. And when they are not manic, they are depressed. Continually, drastically, and for long periods of time. That's how bipolar is classified. Ever see that old commercial for zoloft? Where they advertise that you're not the only one affected by your depression? Your daughter knows if you're depressed, and the way you act around her wont exactly be positive and normal if you're continually depressed and then suddenly manic around her like that. Bipolar is really serious. Its not just everyday, I'm stressed out so someone else needs to hold the baby for a minute. Everybody gets like that.
But I mean, if medicine helps you, then obviously its a definite thing that you should go for. But even WITH medicine I think that it should always be considered that maybe something needs to change for the better, made possible by your willingness to change yourself.