Late period continues

Hey guys! I'm about 9 days late, taken blood tests and clear blue digital tests and both are negative. I'm starting to freak out that maybe my thyroid meds are doing something to my cycle? My cycles are legit clockwork so they come exactly on the time they're supposed to. I'm not sure if I'm psyching myself out. I made an appointment for my obgyn but Idk what to even ask her? Help!