we can't only afford one baby for now what's the best method??

o.z
Hello lady's I have never use birth control method and I know I don't want more kids I have 2 daughters and one more on this feb. 18 after that i want to use protection and work hard for them.. I was thinking  surgery to never have kids again but I feel youn I'm 27 lol is not that young hahaha what are you guys thinking of using?? Or what is the best without many hormones?