Feeling Bummed

OK, so me and my husband have been ttc for about 3 years now. I have been taking prenatal vitamins for about 3 weeks , I've tried Chlomid once , wasn't successful so we will try again next month, I have decided that I'm going to try and loose some weight as well as him and he has decided to quit smoking cigarettes . Also we want a girl so bad, I've done a little research on it, I know you can't fully predict but you can try.. lol but regardless what ever the child may be I will be very happy, the fact of the matter is just getting pregnant, Now I am 29 and my husband is 40. But from research and talking to my dr. he said that age doesn't matter. Please anyone give me some tips and advice on what to do. Oh one more thing they did do a blood test and tell me that my progesterone levels are low . so therefore I'm not ovulating.. Help me please!!