Anyone with advice on levothyroxine seasonal dose change

I dropped my levothyroxine dose from 75mcg to 50mcg one week ago, because I’d started feeling hyper with anxiety and palpitations, I’ve had episodes of this in the past, however this time I had had a blood test a couple of weeks previously that showed low TSH 0.63 and T4 16.8. I don’t have the money to see a private endocrinologist and my gp takes her lead from me, and I suggested a drop in levothyroxine from 75mcg to 50mcg, I panicked that of drop of 33% was too much and added 12.8 last night (when I’ve always taken my levothyroxine) and woken early in a panic that with palpitations, I hate the responsibility self diagnosing as I really haven’t a clue and have managed on a constant 75mcg for 7 years, and was on 50mcg for 8 years before that. I wondered if supplements I added over last 6 months/ year of zinc and more recently selenium, Could that have had an effect? Or is that just a red herring? I’ve been taking magnesium for palpitations for ages. In light of the recent blood results I wonder if I should be on even less, or could my thyroid performance has changed, I know it takes a while for dosage change to take affect. I would really value some advice or comment from anyone who is familiar with this.

[sezzy]

I have felt the same over last few days , heart palpitations , really hot and anxious ! So I've just ordered medichecks.com/thyroid-func... that to check c EQUILWELL20 will get you it down to £31 . To see if I need to drop my levo.

[Hidden in reply to sezzy]

Thanks for the promotion code. How do you gage the results, at what point and by how much to reduce your Levo ?

[sezzy in reply to Hidden]

Not to sure , this is first time I've had hyper symptoms so just going to see and go from there! If you get bloods done post on here someone will reply with some help .

[Hidden in reply to sezzy]

Thanks will do have just ordered from medicchecks

[SlowDragon Administrator]

What is the range on those test results?

Anxiety and palpitations can be due to under medication.

Any thyroid tests need to be done after 8 weeks on constant dose (longer if reduced dose)

All thyroid tests should be done as early as possible in morning and fasting and don't take Levo in the 24 hours prior to test, delay and take straight after. This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip, GP will be unaware)

For full Thyroid evaluation you need TSH, FT4, TT4, FT3 plus TPO and TG thyroid antibodies. Plus vitamin D, folate, ferritin and B12.

Private tests are available. Thousands on here forced to do this as NHS often refuses to test FT3 or antibodies

thyroiduk.org.uk/tuk/testin...

Medichecks Thyroid plus ultra vitamin or Blue Horizon Thyroid plus eleven are the most popular choice. DIY finger prick test or option to pay extra for private blood draw. Both companies often have money off offers.

If antibodies are high this is Hashimoto's, (also known by medics here in UK more commonly as autoimmune thyroid disease).

About 90% of all hypothyroidism in Uk is due to Hashimoto's. Low vitamins are especially common with Hashimoto's. Food intolerances too, especially gluten. So it's important to get tested.

[Hidden]

Thanks for your response and advice, I had already ordered a test this morning, not the extended on you recommend but one I did last year that includes T3

my results were

TSH 0.63 (0.27 - 4.2)

T4 16.8 (12 - 22)