Breastfeeding while pregnant...

So I'm actually an exclusive pumper because my daughter was born at only 2.5 pounds and spent 7 weeks in the NICU never learning to latch... Anyways - I'm currently 8 weeks, 5 days with baby #2 and I haven't fully weaned my daughter yet. I'm down to pumping only 2 times a day... But I've heard that breastfeeding while pregnant can cause an increase in the chance of a miscarriage (due to the contractions breastfeeding can cause). I've tried to get in touch with my lactstion consultant to no avail... Does anyone know any information about this or has anyone been through this themselves? I just don't know if I need to quit cold turkey or if it's okay to just slowly phase the last 2 pump sessions out. Thanks!!