Most likely it is from an infection and it won't go away. If anything, it will get worse. Sometimes you can add a non-fermentable sweetener to rescue the batch.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk