TTC 2 Years

I'm 30 years old, been married for 5 years, TTC for a little over 2 years now. Always thought I'd have atleast 1 kid by the time I was 30, and exspected to have 2 before 35. Doesn't look like that's gonna happen. I'll be happy with 1 biological child at this point.
Recently started seeing RE. Periods normal, Ovulation predictors come back positive every month, Semen Analysis Ok, Post Coaital OK, No cysts - polyps or fibroids ... Missed HSG for 2 months (1st month I had flu, second month doctor on vacation). We use to shrug when people asked us when we would have kids - Now we tell them the truth. It saves us from hearing the same question over and over ... Makes things a little easier.
The worst advise I've been given is "You're trying too hard, relax". In my opinion, when battleing infertility - there is no such thing as trying too hard. People that haven't experianced infertility, don't understand the emotional toll it takes on you as a couple - and also as an individual.
I know a girl who's a drug user & an alcoholic. She's 22 and has had 7 kids by 7 differant men. She hasn't taken care of herself or any of the children before or after they were born (all children are with their fathers). She doesn't work and has never even had a drivers license. She's pregnant again now. I could say it isn't fair... but I just keep thinking of the blessings she's thrown away.