Shaving help!

Hey girls, so whenever I shave my Bikini line area the day after it gets all itchey and red and then I get all these red bumps. The razors I use down there are usually new out of the packet.  I was wondering if there is any other way to shave down there? I've tried wax on my skin and it's really sensitive so I'm guessing it will be much worst if I use it down there. In case if I'm using a wrong razor is there any razor brands you recommend? Thank you all for your answers.