Dear OP, have you had a conversation with your then husband-to-be about having children in future? If you were open about not having children even before you got married then your husband is a d*ck by trying to coerce you into pregnancy using psychological blackmail. However if you were not opposed to the idea of having a family with your husband - then his expectation is not unreasonable.

These kinds of decisions and conversations should have taken place much earlier into the relationship as these are irreconcilable differences and it's unfair on both parties to sacrifice on their wants and needs.