I just got off the nuvaring last month and got my period early .. 7 days early which made my period…

I just got off the nuvaring last month and got my period early .. 7 days early which made my period come at 21 days instead of 28 days like usual. We tried to concieve this last time during my period, because he was leaving out of town for work, and now 5 days later im cramping. What are the odds i could be pregnant? I mean, if my period is irregular because of nuvaring. But i was on my period? Low chance? Hmmmm