Trying for 3 years...FRUSTRATED!!!

I have been using MyMonthlyCycles for over 2 years now but this is the first time I have been on this message board. I was SURPRISED to see I was not alone not only in my problem but also in how I have been feeling.

I have been married for almost 11 years and have been TTC for almost 3 years. We did get pregnant back in Nov of 06 but I miscarried a few days before Christmas of 06. Ectopic pregnancy they called it. I had to have one fallopian tube removed. We have been TRYING hardcore ever since. We tried sex every other day not knowing when I was ovulating. Finally broke down and tried the ovulation kits which we have been using for a little less than a year now. Nothing. My husband and I are getting so frustrated that it is beginning to affect our marriage.
To make matters worse... My cousin just had a baby on June 26th. Funny thing is, SHE DIDNT EVEN KNOW SHE WAS PREGNANT!!! I was up there just before they diagnosed her and was shocked when I found out. I was shocked, happy, and then immediately became jealous and very upset. I have been trying for 3 years now; she doesn?t try and gets the job done. I want children so incredibly bad; she had no desire to have children. In the scheme of things.... HOW IS THIS FAIR??? Don't get me wrong. I love my cousin and I am incredibly happy for her and she is extremely lucky to have had a beautiful HEALTHY baby boy, but I still can't help to be jealous.
I see my Doctor on July 22nd. I have read several of these posts and have come up with questions about drugs, shots, procedures, that I had no idea existed that I plan on asking my DR about... Is there anything you think I should be asking? After 3 years of trying and what seems to be endless frustration I hope this is just the beginning and not the end... Please help. If you think there is anything I should be asking about, drugs, procedures, anything... I honestly don?t know what to ask her other then.... WHY AM I NOT GETTING PREGANT AND WHAT CAN I DO TO CHANGE THAT?