What Could Thick Yellow And Red Spotting With Itchy Vagina During Periods Indicate?

suppose to be, my menstruation period would be this week, but what comes out is just a few amount of thick yellow red on my underwear. the other day, a red blood came out but just a few. after i take a bathe, another few red red but not totally red. its just like pink color. but it only happens for one day. and now, still yellow red few amount of blood comes out on my vagina. its been 5 days already. and every around 3-4:00 am in the morning, my vagina is so itchy. and now im so bopthered if what really happens to me. this is the first time that i experience this kind of thing.