Hi I'm Mary And I'm 18 And Ast Time I

Hi I'm Mary and I'm 18 and ast time I got my period what the 24th of December and I lost my virginity January 11th we used condoms the first time but on the second round we didn't he didn't cum but I still took a Plan B an hour after and I still haven't gotten my period and I'm really worried that I might be pregnant it's already a week late. I am really regular with my period and I worried because it's late. I have not gotten any pregnancy symptoms at all since the incident happened so I don't know what is going on. After the 11th we had sex again on the 12th twice and always on the 13th and again on the 27th with a condom all of those times. I reallly need answers and advice and help with this concern I appreciate your help thank you.