It is best to hold off on the 60,000 IU weekly dose for now, since you are not severely deficient for
Vitamin D3, there is no such urgent need to take such high dose. U can switch to a weekly oral dose of 4000IU. U must get a repeat Serum Vitamin D3 checked, and then we can plan your further course of supplementation.
Next Steps
Lab Work:
Get an ECG done on urgent basis, to rule out any cardiac problem. Get your
Thyroid profile done, since you are on Thyronorm(levothyroxine), u should know that excess of thyroid hormone can alse raise heart rate. If any abnormality detected, we can change your medication dose.
Also get your Serum
electrolytes checked.
Health Tips
If you experience increased sweating, palpitations(feeling of heart beating through your chest), chest pain, Anxiety, increased or reduced appetite, dizziness, weakness , immediately approach your nearest medical facility.
Lifestyle Adjustment:
Avoid Caffeine(coffee, tea, coke, energy drinks).
Take good sleep.
Reduce stress.