whooping cough shot

Kristianna
Should I get it? Like I heard all these bad stories about getting it then again I heard good stories as well. I'm 30 weeks today & really thinking since I have a prescription for it. This is my first baby so I wanna make sure he is healthy as can be but I don't wanna do anything to harm him. If you guys could give me information about it, your opinions, etc. 
& no, I'm not saying I absolutely won't get it but I'm debating. Also please no rude comments as I'm not trying to make any arguments happen as I know how some people can be about these things. (: