Thyroxine requirements increase by around 40-50%during pregnancy and hence dose needs to be increased from prepregnancy levels.
The target
TSH should be less than 2.5 in first trimester....
So you will need a small increment in your dose...
Next Steps
consult a physician
Health Tips
avoid cabbage, cauliflower, sabudana .
eat health and exercise regularly as advised by your gynaecologist.