Hi there, I have understood your concern. I will suggest you the best possible treatment options.
1 ) First of all do not panic.
2 ) If you have history of menstrual cycle although of some different patten , chances of you having
pregnancy are almost nil.
3 ) As you might be aware that the very first and important sign of pregnancy is a missing period.
If you have history of unprotected sex act in the previous cycle, then you stand chance to get pregnant.
4 ) To clear the dilemma about pregnancy and your altered menstrual pattern, I will suggest you to get morning's first sample of urine tested for pregnancy. In case of doubt blood
beta HCG test and USG will be of help.
5 ) Even if you are pregnant, you can opt for termination of the pregnancy with medicines safely till 9 weeks of pregnancy under medical supervision.
I hope this answer helps you.
Thanks.
Dr. Purushottam Neurgaonkar.