Please help

So I’m 6 weeks postpartum and I was planning to wait until my checkup on Monday to have sex but my husband got really horny and pulled me on top of him and started fucking me, it felt so good so I waited a minute before I stopped him and got a condom then we continued. I’m panicking now because I’m so not ready for another baby just yet, he said he didn’t pre-cum? But can men actually tell if they did or not? I really can’t afford a plan-b but I can’t afford another baby yet either! Can you even take plan-b post partum? Should I go get one? And does anyone know if planned parenthood can provide one if I can’t afford it