Anyone have hyperthyroidism?

For 20 years I’ve had the opposite—HYPOTHYROIDISM and now suddenly I’m told I have Hyperthyroidism. I really believe it’s because my doctor gave me 100 mg of levothyroxine and that it worked “too well”. I think it’s medically induced and always thought giving me 100 was too high. Now he wants me to see an Endocrinologist and said my number for my thyroid is too high—29.1. Anyone on here have this problem? He made it sound like I should get to the doctor asap but I feel fine. I called and they are all booked through December so I need to have my primary call there to get me in sooner. Is this a big emergency? I never liked taking levothyroxine and I swear this “hyperthyroidism” that I’m having for the very first time is medically induced. Thanks for advice.