My 8 Month Old Girl Is Passing Stools 3 Times

My 8 month old girl is passing stools 3 times a day frm last two days. I noticed it is more often aftr drinking milk. She is formula fed and is on solids. Her usual pattern is of 1 stool daily. She is teething too...its her fourth teeth. But earlier it was never d case. Do I need to worry.