My vaginal discharge is weird. Mean?

So my vaginal discharge is kind of weird. my normal discharge would be colourless and or sometimes the colour can change to white during certain period. but recently, my discharge is kind of greenish and slimy like mucus or snort. my vagina also kind of itchy and the skin around it kind of peeling off when i rub it. I started to search online how to treat it at home and i found one website that said to put garlic into my vagina and i did it. I've been doing it for two days straight and the symtomps fade. but just now, i went to the toilet and i notice that my discharge colour is red like period blood but with some brown colour. i thought im on my period but i checked it again and there's no blood at all. there's just like brown tint colour in my discharge. what does this mean? and the last time im having sex is 11 days ago.