Breastfeeding when Pregnant

Our little man is 8.5 months old and we got a major shock this week when I got a positive pregnancy test. Never got my period back so not 100% sure how far along we are but lab results suggest 5ish weeks.

I have had a 50% drop in my pumping output over the past 1.5-2 weeks. Little man still seems satisfied after nursing and has adequate diapers.

Anyone have experience with this? How long where you able to breastfeed? I know everyone is different, but I’m not ready for our journey to be over. I had just reach a stash big enough to send bottles to daycare until he is 1, but he only goes twice a week so it’s not a giant stash.