Nursing while pregnant

Roxy • 2 kiddos and baby #3 expected March '18
Hi mommies, 
Is anyone still nursing? My 15m old nurses 4-5 times a day still and her latch has gotten painful and pinches. I'm sure it's from the hormones. I never really planned on tandem nursing but weaning her is too hard on me. What are the chances she'll wean on her own due to the pregnancy?