The past 4 or 5 days I've been experiencing nausea and headaches when I eat. Tums and Zantac (ranitidine) don't help, and it is worse at night. Help? Not pregnant

Nausea, headaches. There are many possibilities. You may have an infection or reaction to something you are using or substance you are taking or exposed to. Best to see your doctor for a check up about this problem.