You should get Free T3 and Free T4 tests.
You will probably have to start on a thyroid hormone replacement medication, as I noted above. It will be some type of thyroxine and must be prescribed by your doctor. You should start out at a low dose and increase by small increments until your symptoms are gone.
Thanks
Should I go for T3 and T4 test. What care can help me to overcome it.
TSH is a pituitary hormone and is a diagnostic tool at best. Your elevated level indicates that you have hypothyroidism. Is that they only test that was done? Your doctor should have ordered Free T3 and Free T4, which are actual thyroid hormones, as well.
TSH, itself, does not have an effect on your health; however, since it indicates that your thyroid is not working properly and that you are lacking thyroid hormones (hypothyroidism), there will be an effect on your health, because you can't live without adequate thyroid hormones. Common symptoms of too little thyroid hormones are fatigue, weight gain, constipation, hair loss, cold intolerance, muscle/joint aches/pains as well as others.
Typically, when one has hypothyroidism, they are prescribed a thyroid replacement hormone whose active ingredient is levothyroxine. The actual name of the medication will depend on your location.