My cycle was only 18 days this time around. I normally have a 25-27 day cycle. Should I be concerned?

I mean I understand your cycles can vary and that’s obvious since mine range from 25-27 days, but I’ve been menstruating for 15 years, and for at least the past 7 years, I’ve never had any issues with irregularity. An 18 day cycle is certainly a surprise. I will definitely consult with my doctor if it continues. Thank you for your response.