Thy3f - Half of thyroid removed and now waiting for results. Feeling very fatigued, is this normal?

Incidental finding on ultrasound.
All been very quick and feeling completely overwhelmed.

Had half of thyroid removed last week and now waiting for results.

Is it normal to feel extremely fatigued after?   I was not expecting to feel so awful.

My mother died of cancer and my youngest daughter is currently receiving cancer treatment.

I am really worried about the whole situation and need words of comfort to get me through to results day.