Sex 3 weeks pp

My husband and I had sex last night just shy of 3 weeks pp... he pulled out but I’m honestly just terrified of getting pregnant again as my children are 15 months apart and I can’t imagine being pregnant again right now. Stupid question, but is it possible I could be pregnant? I’m ebf, but I’m just really freaking out because I know plan B is not recommended while breastfeeding. My husband hates condoms and doctor said she’ll put me on birth control after my 5 weeks visit. 🤦🏻‍♀️ I know, I know... I’m an idiot. Please don’t bash me.