Help, noone seems to know what's wrong

i have a problem with my lady parts, my vagina. i keep getting tears that bleed. their on the outside of my vagina along the lips in the folds. then they get sore, itch, burn. went to gyne and she said yeast infection. took the yeast pill for many days, 2 to 3 times in a row. told me put desitin on to help burning. was so swollen and bad i could barely go to the bathroom. went back, diagnosed atrophic vaginitis and used estrogen cream) so between the yeast pill, the estrogen cream i dont know what cured it but something did.
i really dont know what i had.
its been about 2/3 weeks, i have another skin tear thats bleeding. anybody have the same problem? can the yeast infection still be present? am i just that dry? anyone else have this problem? im desperate for help.
sorry so long.