This evening I prepared caustic soda for clearing the toilet! Only problem is I breathed some in and could not stop coughing, felt like it was burning, Ifeel okay now ecept for a slight wheeze, will this go, and will it cause any problems with my unborn baby.
My room mate at Uni did that to try to unblock the sink (that was years ago, though). the wheeze will eventually go. I think I would be inclined to ring your maternity unit with that question though - I'm sure they won't mind, and it's probably a good idea, to put your mind to rest, if nothing else.