Just wanted to agree with the last 2 posts. Whilst I'm not suggesting there is anything at all wrong (no one can tell you this without meeting your little one and discussing her behaviour more fully with you) I would also recommend having her checked out by a peadiatrician.
to you. It's so hard when we feel we are not enjoying parenthood as much as we would expect. It does sound like you have been having a difficult time without much opportunity for a break. PM me if you would ever like to chat!

Please let us know how things go. Hopefully this is just a personality phase that your DD will grow out of.