Stopping birth control?

Trix
Hi everyone ๐Ÿ˜„ 
I stopped taking birth control pills mid pack and I am a bit unsure of what to call my CD1. 
I had my last period from the pill 6th - 10th June as normal. 
I came off the pill mid pack on 15th June and had a very short withdrawal bleed from 17th-19th June. 
Does anyone know when I should be due my period? If my last period is what I've to go by I am 2 days late, but if my withdrawal bleed is my CD1 it's due next week.
Thanks in advance x