Thanks for posting the query.
I understand your concern.
Your menstrual irregularity could be due to hormonal
As you said you had your periods last month, it is unlikely that you are pregnant.
But If you want to confirm for your satisfaction, you can do the urine pregnancy
test at home. Kit is easily available in the pharmacy.
I would suggest you to meet the gynecologist to regularize your cycles.
Hope I have answered your query well.
Wishing you a very good health.
Dr. Jyoti Patil.