My parents are forever pressuring me to become a doctor. My sister studies law and will be a lawyer, so its up to me to be the doctor of my family

considering both my younger 2 brothers are completely rubbish at studies.
Just finished my A levels, awaiting results, and off to med school next March

.
The problem is, I dont really feel like being a doctor. Or anything else for that matter. I wouldn't mind being a doctor but, in my country at least, you need to be a houseman for like 2 years ( become like a trainee doctor ), and supposedly, they work your ass off 24/7. You are always on-call etc ( because my country lacks doctors badly ), and there was even a report that one of 2 new doctors in my country undergo mental diseases like depression XD. What should I do ?