I'm currently 24 weeks pregnant and my 2 year old breastfeeds and I noticed its not milk anymore its collosturm, will it stay like this?

See below. No. Colostrum won't be forever coming from your breasts. It's related certainly for your new pregnancy. Your 2 year old should be breast fed at this age. Chose appropriate food for your child. Breast milk will make him/her deficient of many nutrients at this age.