Medical Assistant to a doctor

The medical authorities have not yet licenced you to practice.

However, you have been working with some practicing doctor, hence complaint can not harm you, even if admitted by authorities.

There is nothing to worry and no legal issue is involved in the facts posted. 

You are studing medical being an engineer as mentioned by you ?

You can very well be a  trainee with a practising doctor in order to learn the profession while studying. 

There is no illegality in it.

If someone who do not like you is creating problem, let the authorities euqnire where you can reveal the facts and ask your doctor to vouch for you, there is nothing to be scared due to some complaints made by unscurupulous people, against you.