Birth control pills for Hashimoto patients

To add to that, I have Hashimoto's, a reason why I am a bit worried about taking birth control pills. I would seriously prefer birth control pills (while using the condoms of course), but friends who have had hypothyroidism have warned me against birth control unless I begin taking thyroid supplements (which I have been advised are premature at this stage). I would really like to know if this is a valid concern and in which case, what I should do.