Misscarriage

So today I started what I thought was my period at about 9:30 am and I was haveing extreamly bad cramp and so I took to IB profen and I thought well that should help it usally does but this time it did not I thought it was kinda odd that it did not help. I got to school at about 12:00 noon and still nothing the Ib profen was not working at about 12:30 I went to the bathroom to change my femonine product and I sat on the toilet and I felt this slimmy thing fall out of me and I look in the toilet and it looks like a little sack with a fetus inside so I went to and called my mom and asker her if I was to have a misscarriage would this have happend and she said yeah and then I told her that I think that I had a misscarriage and then I went to get a second opinion from a women who deals with teen pregnancies she works in my school and she said that it does very much so sound like you had a misscarriage and I did not even know that I was pregnant and she told me that most misscarriages happen berfore a women even knows she is pregnant! Even though I did not know I was pregnant it is still hard for me to know that I had been pregnant and I dont know what to do I told my Feance` about it he his very upset as well! Have any of you been through this? If so can you tell me how to deal with it? I just dont know how to I just want to cry all the time and if you are going to say you did not even know so just forget about it then please dont leave your advice I need some lifting up not put downs!