Progesterone suppositories

Ok I know this might be a little strange to ask but I was put on these things a couple of days ago and I was just wondering how far I should put them in and if I could hurt the baby if it goes to far.......I tried to ask the pharmacist and they just kinda gave me a stupid look and said it just goes in vaginally. I did one tonight but I am unsure if I did it enough. Thanks for your responses in advance! :)