Young kids, and babies in particular, may often not have consistent sleep patterns (they are, after all, growing and changing so quickly and so constantly; plus, there's that teething thing...). Good sleepers can turn into sleep fighters, and bad sleepers can all of a sudden start snoozing through the night, and that can all change again and again. I think that it may not hurt to ask the pediatrician (it's always possible that there's something bugging your baby that could be a mild medical problem), but I wouldn't be too concerned about your baby. I'd be more concerned with your own sanity, especially if you're not used to inconvenient sleep patterns.
If you can, try taking turns soothing your baby to sleep if she needs it. There's no hard and fast answer as far as what you need to do. Some babies need cuddles. Some babies need water or milk (especially those who nurse). Some fuss and creak even though they aren't truly awake, and go back to sleep after a little bit. Do what feels right, and, well, it's unavoidable that while your own sleep is interrupted, you'll feel a little worse for the wear.
Something that's helped me to get through my son's sleep troubles was telling myself "it will not last forever!" and mentally taking it one day at a time. He woke up every 1.5-2 hours until he was 18 months old, and I was the only one who could put him back to sleep. He would absolutely not go back to sleep on his own (at least not in a way that I was okay with, I couldn't stand the idea of him crying for a long time); fussing lead to waking up, and he would get more and more wound up until he was fully awake and very unhappy, and need very active soothing. Nothing was wrong with him, it's just how he was wired--he hated falling asleep, feeling sleepy, and waking up. I've received all kinds of well-intended advice that essentially came down to telling me I was doing it wrong, but the reality of it was, all was to come in its due time. It got better one day.