Talking to My Mom About Using a Cane

I’ve been planning on talking to my doctor about using a cane and my appointment is tomorrow. This isn’t an appointment specifically to talk about a cane (I’m getting trigger point injections) but it will be with my pain specialist. I need to tell my mom about this tonight because I live with my parents and she will be at the appointment. I’m really scared about how she will react because I don’t think she has ever taken me 100% serious. I’m already struggling with losing abilities and I really can’t handle her being upset with me on top of that. Does anyone have advice on how to tell her that I want to bring up mobility aid use to my doctor? I don’t want her to think I’m being dramatic or giving up.