I stopped taking birth control after i got my period i never restarted it again but then a few days after i was spotting..how do i know when im suppose to get my periodwas that like a period confused?

What you experienced is the withdrawal bleed which is caused by the hormones decreasing from your system. After the withdrawal bleed occurs, this means your body is begining to ovulate again and you're at risk of pregnancy. There is no accurate way of saying when your period will arrive. It can be anytime after the withdrawal bleed upto 4 weeks.