I Had My Whole Thyroid Removed April 2016 Due To

I had my whole thyroid removed April 2016 due to thyroid cancer and haven't had a period since. I didn't need any RAI. Currently I am taking 0.075mg synthroid and my numbers are good. I'm a 18 year old female. Before surgery I had very regular periods now I haven't had one in over two years. Am I infertile or is it just that my hormones are out of whack.