I'm 15 And I Wear Partyliners Everyday.I've Been Doing This

I'm 15 and i wear partyliners everyday.I've been doing this for months and though i know its not healthy at all i just still did it.Now my vagina is super red,sometimes i have an itchy feeling but i Rarely even have a vaginal smell and super red and irritated.and so now i will not usw them anymore,but i also need a fast way on how to reduce the red and irritation down there! Should i wash there with salt or smth? Please help! Btw im very young,15