Hi. Three Days Ago My Boyfriend Came In His Hand,

Hi. Three days ago my boyfriend came in his hand, after that he wiped his hand with a dry tissue and then touched me. He didn't finger me, one finger was at my opening but he didn't go in. Because we were scared, I took Postinor2 in the next 36 hours. My question is, should I expect withdrawal bleeding in about 5-7 days? And is that considered as my period or do I have to still wait for my period. My last period was on 18th of October