Pregnancy

So my boyfriend and i had sex on Wednesday without protection i have been in the implant since August but since my period wasn’t stopping the doctor put me on the pill as well as still having the implant. When we had sex he came but he pulled out so after he was done he peed and we had sex again so the second time he pulled out and he came again and i went to wipe it off and my hand was on my vagina and I’m not sure if i had any on my hand still. So should i take plan b or am i just being paranoid ever since we had sex my stomach has been hurting.