3 days spotting then a 1 day period?

Stephanie
Hi, 
I'm wondering if anyone can give me abit of advice. My periods are pretty regular from 28/30 day cycles and I always have a few days spotting before I come on and then am on for 3/4 days. I'm also always in a lot of pain with it, getting bad cramps.
This cycle has been very strange I spotted lightly for 3 days, come on for 1 day with little stomach cramps and then that's been it... 
I'm unsure if this is just a light period or I should take a test? Don't want to get my hopes up xx