Amber
First, being DDF508 should not matter in regards to getting pregnant.
It took 5 (or maybe 4) months to conceive my son. To conceive my daughter it took 3 but I got pregnant right away, had a miscarriage, did not get pregnant the next cycle, and then got pregnant. If you have been TTC a year it won't hurt to visit your gyn. But you can be proactive too. Do you chart? If not, the best thing you can do right now is read the book "Taking Charge of your Fertility" by toni Weschler. Get a basal body thermometer and start charting asap. It will take a few cycles to see how your cycle works. Also get some cheap ovulation prediction sticks from ebay. I had a cycle that was about 32 days long but I didn't ovulate till at least day 22 so if I had been going by the 14 day rule I would have missed my fertile window every time. I also used preseed during my fertile window. google it and get some! Several CF women have said they use(d) preseed.
good luck