I am so sorry for you at present. We seem to be left high and dry because doctors do not know best how to treat us, except look at a blood test. I know exactly what you feel as I couldn't believe I could feel so much worse than before being diagnosed, which took a long enough time with different diagnosis and treatment for things I didn't have. I also had to call the ambulance quite a few times, from work or wherever. I am fine now so we have to read, learn and ask questions.
As your dose of levo increases, hopefully you will begin to feel so much better.
Request a new blood test from the GP, and it should be the very earliest, fasting (you can drink water) and allow a gap of approx 24 hours between your last dose of levo and the test and take afterwards. Always get a print-out of your results from the surgery and make sure the ranges are stated. Ranges differ in labs and it enables members to respond.
You should have a TSH, (thyroid stimulating hormone) which is from the pituitary gland which tries to flag up more thyroid hormones when thyroid is struggling. Your need T4, T3, Free T4, Free T3 and thyroid antiboies. B12, Vit D, iron, ferritin and folate. Everything has to be optimal and we are usually deficient.
Doctors seem to have been told that a TSH and T4 reveals all. That's not the case and the suffering goes on.
We have recommended labs that do pin-prick home tests and I'll give a link just in case your Frees aren't tested. Levothyroxine is T4. T4 is an inactive hormone and converts to T3 (Active hormone) and it is required in all of our receptor cells
in order for us to function normally. It does take time though with steady increases in levothyroxine. Levo should be taken first thing with one full glass of water and wait about an hour before eating as food interferes with the uptake.
Or you can take it at bedtime as long as stomach is empty. If you decide bedtime dosing, you miss this when having an a.m. test and take it after test and at night as usual.
Always get a print-out of the results with the ranges and post if you have a query.