Breastfeeding and pregnant

Any mommies out there who are still breastfeeding and pregnant?
My son is 21 months old and still nurses 2-3 times a day, today we found out we are pregnant with baby #2!! I never thought I'd still be breastfeeding, but it's such a special time for me and my son. And he does not seem interested at all in weaning. I planned on weaning him at 2 years. Thoughts?