Plan b?

I had unprotected sex on Monday, but he did not cum in me and on Wednesday I still decided to take a plan b. Today, Sunday I had unprotected sex again & he came in me... after moments later of me arguing with him about it he broke down in tears and told me that he couldn’t have children bc he wasn’t fertile enough or something like that. Anyways, my period was supposed to come today, but it’s late and there’s no signs so I was wondering if it would be bad to take another plan b again? like yk in the same week...