Hello , I Had Unprotected Sexual Contact On Saturday Early

Hello , I had unprotected sexual contact on Saturday early morning ( about 4 am) . There was no penetration but genital contact . later in the evening i got cramps and light bleeding began so i thought it was my period seen as the timing would be about right ( i have relatively irregular periods) but they were light so i took the emergency contraceptive pill about 30 hours after the sexual contact. The bleeding is no very light . I am very worried and am looking for advice