TTC and caffeine

So my husband and I have been TTC for about 3 months now. I have irregular and very long cycles so I know it's going to
Take some time to have a more normal cycle (doesn't make it easier though) but was wondering what everyone's thoughts are on drinking caffeine. I have cut back to 1 cup a day but still have days where I drink a second cup later in the day... Since I am a nurse and work 12 hour shifts sometimes I can't help but have more caffeine. If and when I become pregnant I know it will be easier for me to
Cut back but since it's been a while and has not happened yet I feel like I shouldn't suffer through the days. What are your thoughts?