I took Norlevo last week monday. Approximately 20 hours after having sex. I am not sure if the semen has entered my vagina or not what happened is that he had his semen on my thigh. And after having his semen out he first wore the condom opposite side of it then after wore it correctly I am afraid that the remaining semen on his penis may have touched the condom. Anyways after taking norlevo I had diarrhoea for about 3 days.and now I'm having light periods. I'm not sure if the cause is because I'm too worried and stressed or what. My periods were due in less than 15 days. And I think I got them on time but the quantity was just not enough