opinion??

I need some opinions. So lately I have had constant itching in the vaginal area, but it's not a yeast infection because the only symptom I have is the itching, and it's not an STD because I haven't had sex. But I wear liners all the time all day and I change them of course. My periods are very very irregular so I never know when I bleed or have discharge and I don't want to ruin any of my panties and risk bleeding through my pants that's really embarrassing. Since I am very sure it's not a yeast infection or STD I am think maybe a reaction to the liners (also my mom doesn't know the right and only kind of liners I can use so the last week or so I have been using ones she got me, and around that time is when itching started.) Could the itching be a reaction from the different type of liners or could be something else I have missed? I am very clean down there, I shower every day, change my panties twice a day, I make sure not to wear too tight clothing and I clean with natural product's. Also, I didn't really know what group to post this in so I apologize if it's the wrong group.