I would recommend setting up the initial appointment and seeing what the RE recommends-different doctors often recommend different things. You are obviously very committed to getting preganant if you have been charting for over 6 months. The age specific guidelines your ob spoke of, to me do not really apply for CF women. For most of us, the younger we are, the healthier we are, and the quicker we can bounce back-not only from a cf exacerbation, but also from pregnancy. My fertility issue was my cervical mucus, not nutrition.
I became pregnant with twins after IUI. My only identifiable fertility issue was the cervial mucus. My fertility specialist was concerned about multiple births since ovualtion was not a problem. We were counseled on embryo reduction-scary thought. My CF doctor was extremely supportive of me getting pregnant, however when I told her twins, the expression on her face was concern not joy.
I am blessed to have my little boy and my little girl. I had a difficult pregnancy and consider myself very fortunate to have delviered 2 healthy babies and that my lungs recovered back to my baseline. However, if i was older or not as healthy when i conceived, i do not think me or my babies would have been as fortunate.
This probably goes without saying, but it is very important you and your husband both feel comfortable seeking fertility treatment. It does add stress to the TCC process-much more so than charting and ovulating kits.
Whatever lies ahead of you, when the time is right you will become a mom to be.