So I just ordered soemnipple balm to try and quit breastfeeding

My 2 year old still breastfeeds like hes a newborn.he wakes up every 2 hours to breastfeed still. I'm pregnant and starting to get worried I'm not gonna get him off the boob or in his own bed by the time our little one is born. So I ordered this nipple balm that's suppose to make it taste bad. I kinds feel bad for buying it already but I'm having no luck on weening. Read lots of great reveiw, have any of you ever tried anything like this before?