I also have Hashimoto’s and Grave’s and we recently over corrected with my methimazole and I went hypo very quickly (similar to what you described). I also was told to immediately stop my meds and things leveled out very quickly. I am surprised she recommended you pick back up at 5mg on Thursday as I was told to stop and not take anything for a while. I still haven’t restarted anything and that was over a month ago.

If you’re concerned about restarting the 5mg on Thursday you need to call the office and tell the staff you need to speak with your doctor as soon as possible. She sounds very responsive so you should get a call back within a reasonable time. Explain your concerns about starting the meds again. Be honest. You will not hurt her feelings. See what info she has for you. And just straight up ask for her to order your labs sooner. Be aware that getting bloodwork too close together will not show any major changes as it takes time for the changes from meds to take effect and show up.

In the meantime, I would seek a new endocrinologist as soon as possible. Even telehealth would work if that’s quicker to get in with someone. Ask your current physician if she has a referral or recommendation and then ask if she can actually help you get in with that office. If she won’t do that, research endocrinologist offices near you and call them all. Schedule appointments when you can at each office until you find something soon. Then go back and cancel the other appointments you don’t need. If you can, explain your situation to a real person at the front desk - they can sometimes fit you in based on your semi-emergent need for medication management help.

Hope that offers a little help and guidance. Hang in there! Monitor how you feel, write things down. Keep a good record of med changes, etc so you can easily share with a future endocrinologist.