unprotected sex !!!!!!!!

So I got my period march 10th and it stopped march 13th I had unprotected sex on march 14th and he came inside of me I took a plan b on march 15th the plan b caused me to bleed again on march 20th and I stopped on march 23rd BUT on march 21st i had unprotected sex again and he came inside again I'm so scared that I'm pregnant PLEASE HELP Ik it's confusing and you guys prolly can't tell me if I am or not lol