Should I email the professor or let it go?

I’m taking a stats course. A classmate of mine made a discord so we could all communicate and ask for help. i befriended (let’s call her Brenda). We would text to help eachother study and all that and even hung out but we would never discuss class when we’re out. Anyway, the winter semester ended and I passed barely with a C after trying so hard and studying and even taking advantage of office hours. I honestly hate math because it’s not my strongest subject. Well I asked Brenda how she did because apparently she would struggle too. She told me that she passed with an A. Im like “howww?” and she said she would copy and paste the questions online and get her answers there. I feel like it’s shitty that I worked hard and barely passed while she just cheated her way through the class. Should I notify the professor or let it go?😞