Talk to Gynecologist on Gynecologist

Aoa....I am unmarried ....hmesha periods on time,regular and normal aye hain means starting se jese routine the wese e ....is month 5 days phle hue hain but jese hoty thay flow same raha now on day 12 and 13 spotting hui which I ignored but on day 14 it's more than spotting but not like that regular flow ....I am so worried ....ye ku ho raha ha ...what might be the reason ....plz guide