When do you say Enough Is Enough?

This is the last shot, after this we give up, we quit trying and I guess just focus on trying to adopt. My Husband & I have been TTC for 3+ years. Infertility is the most Heartbreaking, Heartwrenching, terrible thing to go through. People who get pregnant easily and naturally of course don't understand what your going through, and come up with the most asinine "advice" on how to get pregnant, ranging from RELAX which makes me want to puke, to well just don't think about it, which makes me want to punch them in the face. They have no idea how every month is like a mini death. Every month when you get your period you feel like someone has died. Now I am on Clomid, and trying to be positive. It's my second and last round. I am having "adverse reactions" to the Clomid. Does the Dr tell me this the first go round? Nope, just get told, Oh you have 8 folicles! WOW, I think I hope that I get twins, and no more than that, because with the economy, Jeeze we can hardly afford the treatment much less having a litter, but oh no, oops we didn't discuss with you that your endometrial lining is too thin for implantation. So all that excitement all that ooh I finally ovulated, we're FINALLY going to get pregnant. NADA. on top of that my Grandmother passed away, and I was just holding on to the comforting thought that I was going to be pregnant and new life was starting when one was ending. Nope. Do I get sympathy from my DR? Nope. It's a racket, It's a means to an end for them. He'd driving a Carerra and I have a 10 year old car. Am I stupid to try for a kid, instead of buying a new car, going on vacations, being a happy childless person? Well for me I feel that someone is missing in my life, and I can't stand the thought of living my life childless. So I guess if this round goes fruitless we'll have to adopt, but I'll always mourn the fact that I lost out on having one of my own.