Liquid Antacids

I have, what I believe, are a few fairly simple questions. Such as...what liquid antacids did you take during pregnancy (or were prescribed to you, etc) without any problems? I pretty much have to use it to help control acid and nausea especially when I'm eating with someone else and forced to eat a type of food that I normally wouldnt while pregnant due to the horrible indigestion. But I'm just wondering which one's are approved and safer? Or does it matter much?

Have you tried Tums? I know they're not liquid, but they're safe during pregnancy.

Used tums and Prilosec but still have to use the liquids about once a day usually. I'm not sure I'm using the right thing tho, I"ve been using maalox or mylanta.