Hello Doc , Actually My Periods Date Was On 3july

hello doc , actually my periods date was on 3july of last mnth ,n in this mnth period delayed alot . i waited for my periods to come upto 17aug, then i done urine test my prega news it came neg, doc told me to take sysron-n for 5days ,hence i started taking it from 20aug n yestrday on 24 aug i complted that 5days tablet each day two, aftrnoon n evening. nw when will i gt my periods. actually, my periods nvr delayed so m litle worried. when i will nw gt my periods, n wht will b d resn do rp. thnku