Mr. lybrate-user, thanks for the query.
Usually with TSH < 10 mU/L, no treatment is advocated. However, if there are troublesome symptoms are present then treatment is given. In your case symptoms like constipation
and cold intolerance as well as weight increase are indicating that there is a need for treatment. Your BP is also not in good control (ideally with treatment it should be 120 to 130 / 70 to 80 mmHg). Thanks.