Hi, During pregnancy many physiological changes occur that favor the appearance of non-physiological changes. Before thinking about a pregnancy (which I do not rule out) you have to take into account the risk factors to develop acute gastritis. One of the most important risk factors is cigarette smoking, among others, intake of soft drinks, coffee consumption, use of NSAIDs (non-steroidal analgesics), copious meals and pregnancy. Regarding your question, of course there are chances that you are pregnant, since the non-specific symptoms of pregnancy, such as nausea, sialorrhea, increased urinary frequency, among others, appear during the first trimester of pregnancy, and disappear in the beginning of the second trimester of pregnancy. To make sure, it s best to get a pregnancy test. Hope I have answered your query. Let me know if I can assist you further.