3 month waking up more at night...

My daughter turned 3 months old on the 10th! She will usually sleep 8-9 hours a night. Always always sleep at LEAST 6 hours before waking up to eat and then she would go right back to sleep for another 3-4 hours. The past 2 nights she has been waking up every 3 hours. Is anyone else going though this or know what might be causing this. She doesn’t seem fussy. She seems to all of a sudden always want her paci 24/7.. maybe shes started teething but I’m not sure. Now before you say 3 months is too young to wonder why she’s not sleeping through the night, she’s ALWAYS slept through the night so this is out of the norm for her. Thanks