I have borderline hypothyroidism (TSH 7.4) and a...

Dear Customer
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What is the possible cause of your medical condition ?
in your case , you should have reconsulted your doctor earlier , and doctor should had informed you about that , as thyroid medication doses should be adjested every while especially if you are a new patient 
Can you stop the medication ?
no, your doctor have to confirm the medical condition and make the decision 
What to do next ?
- reconsult your doctor 
- do your thyroid hormone tests again 
- doctor will see the results then will change your doctor and lower it 
- you have to do recosult your doctor again in 2 - 4 weeks and redo the test 
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Kind Regards