I was prescribed Pariet during my first pg for very bad heartburn/acid/morning sickness, but during my second pg I asked for it, and the Ob (at a different hospital from my first pg) looked at me with shock, and said that Pariet should not be taken when pregnant, and so no, she would not prescribe me any!

So maybe get a second opinion?
Pariet is not in the "do not take while pregnant" class. It is in the class of drugs in which there has not been a wide study done on many pregnant women, but for which you can take if the benefit outweighs the risk.

I do hope we don't frighten people into thinking it's a black list drug when it is really just a not-widely-tested-on-pregnant-women drug.