Am I Sarah?

For the longest time it has been my desire to have children. I went through rounds of fertility treatments when I was first married. I got pregnant. I was sooo happy! I told everyone. You see I was told that I probably would have a hard time and I did but it had worked! I went to my Dr's visits and I took care of myself and I did everything that I was supposed to do. I remember I went to my appointment and I got to hear the heartbeat and I just cried. It was one of the happiest days of my life. Time went by and then On July 27, 2005 I had a miscarriage. I remember that day like it was yesterday. Going to the Dr because of the issues I was having.. them taking me in to get a sonogram. Them bringing another Dr in the room me screaming to hear the heartbeat... The somber looks... And finally the news. Having to go to the hospital later that night everything.... My baby would've been three... All these memories come flooding back to me. In church on Sunday Pastor Jeff talked about Sarah and Abraham and how God had asked Abraham to sacrifice his only son Isaac. After it had taken Sarah sooo long to conceive. He was faithful. I asked this question again to my Dr can I have children? Complicated answer.... Yes and no... Am I supposed to remain steadfast and believe that God will give me the desires of my heart? Or are the desires of my heart not his? I know that right at this present time it is totally out of the question, I get that. Am I supposed to adopt? For now all I know is that when I start to think of these events I have to ask God to continue to remove the feelings of bitterness and guilt. It is hard though... That is why for now I will just share my love with other children, and people who need it! I can't help but wonder Will I be blessed enough to be Sarah?