Please don't restart or change your thyroxine dose on your own. Whether you need it now, and how much, depends on a repeat
TSH done a few weeks after stopping, not a single reading.
Next Steps
Get your
thyroid levels rechecked and go back to your treating doctor with the new report before deciding on the dose.
Health Tips
Thyroid hormone medicines are considered safe during breastfeeding when taken as advised, so please don't stop or guess this on your own.