Hi and welcome to Healthcaremagic. Thank you for your query. , I understand your concerns and I will try to help you as much as I can. There are some method but it should be discussed with your gynaecologist. YOu had one risky intercourse during your ovulation period so it is possible that pregnancy occur,but considering your description of it, this risk is minor especially if pill was taken properly. Pregnancy test can be done when period is missed or 8 days after the targeted intercourse so at this point it would be accurate enough to detect possible pregnancy. Standard urine test would be enough for it. It may also be hormonal imbalance caused by Ovarian cysts are which are in most cases small and asymptomatic but sometimes may cause symptoms and require specific treatment. . I hope I have answered you query. If you have any further questions you can contact us in every time.