Thrush!!! HELP!!!πŸ’”

Keziah β€’ I'm 19, and this is my first baby. his names GraysonπŸ’™πŸ’š
My baby boy is getting thrush so bad but I can't breastfeed due to medical reasons. So what can get rid of it or help to where it doesn't get worse?!πŸ’”πŸ’”πŸ’”πŸ’”πŸ’”