Ppd pills?

Did anybody take pills or something for ppd? My pregnancy was emotional because of my boyfriend and a few other things. Me and my boyfriend haven't worked things out and its getting the best of me. I'm not happy and always seem to be snaping at my older kids. I'm crying a lot too.My doctor seems to want to put me on something since I haven't been happy the entire time being pregnant. I just worry how things might turn out if I take pills. Like will a be a totally different person? I heard people on anti depressants are a different person..