Girls, hello everyone. The baby's stool has been green and thick one …

Girls, hello everyone. The baby's stool has been green and thick one day, then thin and watery the next, with yellow mixed in, also thick and watery. We go 2-3 times a day. I'm attaching a photo of the stool from the last time. I apologize in advance. Is this normal? We are 4 months old. Does the baby have tummy pain or teething? About 10 days ago, the temperature was 37.7 for 2 days, neither high nor low.