Have you read up on sleep cycles etc? So, the theory goes that if you rock/feed/assist your baby to sleep, they will wake up after one sleep cycle (40-50 minutes) and look for that prop in order to go back to sleep. But often they wake up completely and can be impossible to resettle.

My DS was a chronic catnapper, and from what I learned talking to other mums, posting here and scouring the internet for the solution, so are plenty of babies, especially at that age. You can try to resettle her everytime she wakes until she learns how to sleep through one sleep cycle. Or you can live with it and get on with things (I did this for months, as DS would never resettle and it was too stressful for me to keep trying and failing). I only decided to work on it when I felt DS was old enough to adapt to me changing the way I put him to sleep (instead of in-arms, now I rock and pat and shh in his cot, and he was definitely not ready for this at 2 months). I also think a good routine helps - do you have structure to your days yet? Again, I didn't really try anything beyond sleep-feed-play until he was about 4.5-5 months old.