thyroid issue and conceiving

anyone have thyroid issue and is also trying to conceive? it seems like my level still isn't within normal range and has been yo-young between low and high while on different mg for the past 5 months. probably part of the reason why it is hard getting preggo. a little discouraging but the doc is putting a referral in for me to see an endocrinologist. I dont know what they can do to help me that my family doctor can't.. blood work and meds. I will keep BDing!