Irregular period?

I'm 18 and I'm a virgin and I've had a regular period for 5 years that lasts for 6 days. My first 3 dYs are very flowy and the rest 3 days are normal. This month, I was about a week late and my period lasted a day (it was just spotting) and then stopped for a day and then It happened for an other day. Is this normal?