Is Drinking Soda Water Harmful To My Baby??!!!

Karishma
Help!!! I'm 9 weeks pregnant & well I have been having really bad stomach/heartburns, upset stomach, nausea. It's really bad so the only thing that gives me relieve is a Soda Water Or Andrews Salts but one of my family members told me that drinking too much can affect my baby's bones! :'( Is this true???!! Please I'm really worried now.