Thank you for being so honest and open in posting this struggle about yourself. There are many people here who want to be able to support and encourage you as you walk the road of CF.
As to your question about methadone, yes, this can be affecting your lung health. It's important for your CF doc to know all the meds you're taking--even if it's embarrassing to tell them. They can advise you how best to proceed, and perhaps even offer you treatment options that may help with the addiction.
You are doing the right thing by getting help for your addiction. That is a tough road to take, and I hope that you will find freedom from the addiction. I encourage you to visit <a target=_blank class=ftalternatingbarlinklarge href="http://addictionovercome.blogspot.com.">http://addictionovercome.blogspot.com.</a> Judith Ann Hillard is an incredible woman who overcame cocaine addiction but now struggles with multiple schlerosis. Her story is very powerful, and if anyone knows what it's like to battle addiction AND chronic illness, it's her.
As to the pregnancy thing, maybe the reason you're having trouble is because your body is simply not healthy enough to handle it at this point. Please consider waiting to get pregnant until you are in a healthier state--both in terms of your CF and your addiction. Your health comes first; I understand the longings to have a child, but for many people (and it sounds like you may be one of them) the stress of pregnancy and parenting can have devastating effects on CF. For your sake and the sake of a potential child, please wait until you are as healthy as can be before pursuing that route. CFers who desire to be parents need to be extremely compliant with their treatment.
For both situations, PLEASE talk with your doctor and perhaps, if your clinic has one, a social worker. They are there to help you.
Warmest Regards,
Lauren