Hi! I've Been In Carafate BD For Ages, Increased To

Hi! I've been in carafate BD for ages, increased to QID because of worsening ulcer/swallowing problems from severe oesophagitis. After two days, feel nausea, sometimes extreme hunger, weakness, generally but vaguely unwell. Some concentration loss, feeling of stress-not related to any true reason. I daren't cease the drug-am allergic to all others!! Should I go back to BD or even TDS ? Thanks!