Just need to vent...

This is cycle 9 of trying for my husband and I. I have an 8 year old daughter that I got pregnant with the month after stopping the pill. I had mirena for 7 years and now it's taking so long to get pregnant it's so depressing. Family members and friends are all getting pregnant and I dont understand why I cant again. I've been temping and using opks every month and every time i see negative tests and it just puts me in the worst mood for 2 weeks. Anyone have similar issues?? I really am starting to think maybe it's from the IUD. I know your fertility comes right back but what if it doesnt? :(