How to use boric acid suppositories.....?

I know this is a dumb question, but I was prescribed boric acid suppositories and I honestly do not know how to insert those things inside of me. They are just like a pill, so once i push it in, wont it fall out when I pee or something? Also, is there anyone who has used it and had any side effects? I have a very big yeast infection and it is kinda sore down there form so much scracthing, they say you should use it on cuts and stuff, should i be concerned?