Effective heartburn medication!?!?

So I was taking Zantac this whole time, now with the recall they’ve taken it off every single freakin shelf in Canada. Last night was my first night not using it, I got tums instead, took the maximum dose and they do absolutely nothing! I was up all night, sitting straight up in bed and threw up four times because my heartburn was so bad. Is there anything else that is stronger than tums that is approved for pregnancy?!? I actually think I might not survive the rest of this pregnancy without Zantac and I’m thinking of paying someone to smuggle it out of a pharmacy for me lol. Please help.