Pregnant by the new guy?

My ex use to tell me I was a worthless woman because I had a miscarriage and wasn’t able to get pregnant again.

And I don’t want to believe that is true but I really never got pregnant again. Afterwards my periods became really irregular but all my tests and ultrasounds came back normal. So my question is could it just have been him? Not reproductively, but just his bad spirit that kept me from getting pregnant? Has anyone gone through something similar and then got into a new relationship and fell pregnant?