I'm scared to tell my mom something might be wrong down there:(

Hello:) I'm writing this as an outlet because I feel like I cant go to my mom for this, and i need to get this off my mind or some help or insight. Recently my downstairs area has been causing me some discomfort. The inside feels a little itchy? It's just uncomfortable and the odor smells almost sour and a little off from what it usually does. And my discharge is a pale pale yellow or green. I'm scared to go to my mom because I feel like she will get mad at me. I'm not sure if it's because my diet has kinda changed recently or if it's an infection. I'm scared to talk to my mom if it is an infection. If it is, is it possible that it will go away on it's own? I'm 17 and I'm scared. Please help me, or just talk to me. Thank you so much!<3