Pregnant and breastfeeding

Okay so I just found out last week that I am pregnant with my 2nd child! My first child is only 15 months and is still breastfeeding. I am trying to wean her and hoping to do it soon so I don’t have to worry about weaning her last minute. My question is though, has anyone else gone through this? Does your body dry you up so that it can prepare for the new baby and make new colostrum? Also, say your milk does dry up, is there a possibility that it won’t come in as good with the second child? I really want to breastfeed again so I’m worried if I dry up, it won’t come in good again and I won’t be able to breastfeed again.