Barbara wouldn't cry if she was pregnant though, they'd just bring the wedding forwards. It would be a bit of an "oops" moment but it's not like she's a teenager or been shagging someone else's husband, she is engaged. It sounds like Barbara got disciplined for something or other (probably being nice) and cries because Trixie asks what's all the fuss about the new nun, something like that.
I think Patsy will be back for sure but perhaps they need her out of the way for a bit. I wonder if the actress is pregnant? Someone mentioned they thought she'd put on weight, and they couldn't exactly have her pregnant on screen when she's supposed to be in a lesbian relationship!