Vaginal infection. I use to have.

I had vaginal infection which use to get better after taking oral medicines but wanted to get rid of the same completely as I felt my vagina was too sensitive and use get infected even by using public toilet. Went to my regular gynae where she told that I have circum oral erosion because of which I frequently get infection so she suggested Cryotherapy but I wasn't confident to get it done so just kept the area clean by using the vaginal wash etc. now I am in better condition,doesnt have irritation or redness and discharge but still I am not sure if it is completely cured. I would like to know if I go for cryotherapy what is the side effects of it and is there any alternative to this,also would like to know how can I make sure I am completely rid of the infection I use to have.