Feeling stressed

I think I still can't get over what my mil did to me. Though she did unintentionally but it hurts me till now. How did u all managed? Example, when baby behave certain ways, she will say is baby sick or what. We will say baby didnt just behavioral n she till date still question why bb this n that. Secondly, when baby cranky she will say why again n compare last time her children not like that... I would say baby different... n she will comment isit never play with baby...but we did almost 24/7 ... I am already stressed I managing baby n I cannot afford to also need handle another situation. But will meet up often so I cannot say no.. even if I wan avoid questioning.. How do u all manage?