8 month old sleeping more than usual 3-4 naps

My baby has been pretty sleepy the last 2 weeks. She usually hates her day time naps but now she looks exhausted only thing that’s different is she has her bottom teeth. She sleeps from 7.30/8pm to 6.30/7.30am I have been to the doctor about something else and mentioned this but they didn’t seem concerned am I just worrying for nothing.