Can i get pregnant 7day before pms

So me and my husband had sex with no protection we already have a son I'm not ready for #2 yet can i get pregnant 7days before my period ? he pulled out but idk why he put in back in ? He's never done that before ,i asked him if he came inside he said no but i don't believe him i think he wants to get me pregnant with baby #2 an he doesn't know how to tell me. what should i do should i go get a plan B or wait for my period in 7days, also i dont take birth control it gets me sick an he doesn't. Like condoms an I'm allergic to latex.