I have this weird thing on my tongue. It starts out on the lower right tip of my tongue as a white half circle and then gradually grows wider and changes from white to the normal color with a red border and is more sensitive than the rest of my tongue. It usually lasts for a couple of days to a week and then goes away out of the blue.

The weird thing is that I have never kissed anyone but have shared food and utensils with my niece (who has the same thing) who eats and drinks after my sister who is a real ****. Anyone know what I'm talking about?

*Edit. Also, the only medication I'm on is OvCon35 which is birth control to help with my period/PCOS.