According to NIH USA, http://www.niddk.nih.gov/health-information/health-topics/endocrine/pregnancy-and-thyroid-disease/Pages/fact-sheet.aspx Women with thyroid problems can have a healthy pregnancy and protect their fetuses’ health by learning about pregnancy’s effect on the thyroid, keeping current on their thyroid function testing, and taking the required medications.
Here's another article that might help shed some light onto women with overactive thyroid and pregnancy. http://www.parenting.com/article/hyperthyroidism-fertility Like what Diana has mentioned, it is possible to get treatment to increase your chances of getting pregnant and to have a healthy pregnancy. I wish you all the best!
Definitely see a doctor! If you are looking for a natural approach, do consider the treatments found in NaproTechnology.