Welcome to our forum and you haven't yet been diagnosed but told you have to wait another 12 weeks before another blood test to clarify if you are definitely hypo or not!
Most of our members know full well how that decision flummoxes us as we provide symptoms to also go along with our blood test results.
First thing to do is get a print-out with the ranges from the surgery. We are entitled to them by Law in the UK.
Post them on a new question and you will get responses.
Once-upon-a-time before the 60's we were diagnosed and given natural dessicated thyroid hormones according to our clinical symptoms.
Nowadays - in modern times - we are diagnosed due to a blood test with complete indifference to our suffering - no acknowledgment of our clinical symptoms which can be quite disabling and left to get on with it ourselves. Consultations mainly consist of them looking at computers instead of the patients.
When you have blood test for thyroid gland, it should be the earliest possible and fast although you can drink water. If on levothyroxine or other thyroid hormones you allow 24 hours between the last dose and the test and take it afterwards. This allows the TSH to be at its highest as that's all they take notice of.
Many of our members self-medicate because they are fed-up with the inefficiency and ineptness of our professions who deal with non-diagnosing and non-treatment until our TSH reaches 10. and thereafter don't often provide sufficient to ease symptoms. In other countries it would be around 3.
If you provide your blood tests you will then get more positive responses. Also GP should test B12, Vit D, iron, ferritin and folate and thyroid antibodies as deficiencies in the vits/minerals are usual and can also cause problems.
It is a case of learning and reading. I have posted earlier an archived post today of a Dr who helped many of us who, by resigning from his association so he wouldn't be treated like others who lost their licences and was able, before his early death, to treat and help others to recover their health. He was also an Adviser to Thyroiduk.org.uk who this forum belongs to and is a charity trying to enable us to get the treatment we deserve.
Would you believe that if we are undiagnosed/undermedicated we can develop other more serious diseases - the profession are unaware of this it would appear.
(I am not medically qualified - have been undiagnosed - diagnosed with other problems I didn't have - underwent a procedure for no reason until, finally, diagnosed by a first-aider). This must have taken around six or seven years.