Hi there, I have understood your concern. I will suggest you the best possible treatment options. 1 ) First of all do not panic. 2 ) As you might be aware that in a woman with regular cycles day 10 to 20 of the cycle is the most fertile period of cycle. If you have unprotected sex act in this period, then you stand chance to get pregnant. 3 ) only scanty periods cam not be taken as sign of pregnancy. If you think that there was unprotected sex act in the previous cycle, you can get morning s first sample of urine tested for pregnancy. In case of doubt blood beta HCG test will be of help. 4 ) If the test is negative, then you need not worry at all. You can simply wait for the onset of periods. I will suggest you to get counselled about safe andprotected sex activity, this will help to prevent unwanted pregnancy and STDs. With positive pregnancy test, you can opt for termination of the pregnancy with medicines safely till 9 weeks of pregnancy under medical supervision. 5 ) Secondly, if scanty bleeding during period recurs then to know the reason for the same USG and thyroid function test will be helpful. I hope this answer helps you. Thanks. Dr. Purushottam Neurgaonkar