Struggling with using mobility aids on and off

So I’ve been having a hard time with people in my life with saying that I don’t need a mobility aid when I can walk just fine but the thing is I have severe pain In my knees and ankles and sometimes my hips too but I don’t always need a mobility aid everyday and that’s the thing people don’t like is that I use it on and off and I just really wanna know if anyone who has fibromyalgia does the same thing because it makes me feel hurt when people don’t understand my pain levels on certain days I use a cane or forearm crutches on bad pain days btw