Hello Doctor, I Have Hypothyroidism For Which I Was Prescribed

Hello Doctor, i have hypothyroidism for which i was prescribed with Thyronorm 125mg(TSH was 34.7).After 6 weeks,i took the test again in which the result was (TSH-7.2). My doctor advised me to add 12.5mg along with my present dose(125mg).

I told him that i have my heart beat is fast which is making me uncomfortable. So he told to continue with the same dose.

I still feel uncomfortable with my fast heart beat.

Can you suggest a remedy for that.

Regards,
Imran