According to her posts she stopped drinking 1st week of Feb. She’s just mentioned that if she was still carrying that first pregnancy she’d be into her 3rd trimester now. At a minimum that would be 28 weeks, which means she’d have conceived around 13th January. Surely in that couple of weeks and beforehand going through the IVF she shouldn’t have been drinking
What grates me is she may of had a miscarriage yes but if the dates add up like you’ve worked out she was clearly drinking into her IVF pregnancy which she should have stopped weeks before. So the loss is likely self inflicted due to her selflessness