Promethazine 25mg

Kay
My doctor prescribed me promethazine while pregnant for nausea. Has anyone else every taken this? Did you have any issues? Here is what I found the purposes for it are 
Help please. I didn't want to take it if it will do harm, but I feel so bad and I have a cold on top of it all! Any information will be helpful, thank you. 
P.s I haven't taken it so far.