I was diagnosed with hypothyroidism about a month ago, (I'm 24). My TSH was 6.5 and my free T4 something like 12.2, which I was told should be been around 18. I started on 50mcg levothyroxine daily and almost immediately felt an improvement.
Between days 7-9 I started experiencing a gradually worsening splitting headache which I attributed to the levo so decided to stop my dosage. I then had a very good week of health, probably while the previous levothyroxine was still circulating in my system. I picked up my dose again at the end of the week cutting it down to one 50mcg tablet every other day, as I'd read that side effects can subside once you get used to it. I'd had some hot flushes and palpitations too which coincided with moving towards a more "hyper" state, so decided to persevere.
I continued the new dosage for 3 weeks until last weekend when I started having dizzy, light-headed spells and decided to stop once again 4 days ago. Since then I've had an excruciating migraine-like headache, focused towards the top and rear of my head. Ibuprofen doesn't seem to help and it is relentless, even keeping me awake at night and now 4 days after stopping levo I'm still not feeling an improvement. Along with the headache I've been nauseas, dizzy and have tremor and palpitations, which again sounds more like hyper, despite my bloods.
I saw my Dr today for a follow up who said headaches aren't associated as a side-effect from levo and recommended me to continue taking a 25mcg dose with view to a blood test in 3 months.
I'm now very confused as to whether to restart the levothyroxine or pause my dosage until the headache (eventually) wears off. I'm wondering if it could be some kind of withdrawal? Or even if my thyroidism is auto-immune related and I've swung back towards being hyperthyro and have now been overloading my body for the last 3 weeks. (My doctor also doesn't think this is possible but I will be having an antibody analysis at my next blood test). It would be a MASSIVE help if anyone could let me know if they've had a similar experience, as I'm now extremely worried my headache is something unrelated.
Many thanks in advance