Guys, I just got called from HR department that I have been offered a position from the company. She wants me to sign an offer letter and go for pre-employment medical check up. We have already discuss the salary package and agree on the commencing and resignation date.

The concern I worried is about the pre-employment medical check up. Because after resignation I only go for check up, if the check up failed, I lost the new job and old job as well 

Previously I have also requested medical check up by a local bank, but it is before they offer me so I dont need to worried about resignation first.

Any bro or sis here have done check up after job offer?

Im just afraid got some hidden disease that I'm not even know and I smoke socially, wonder they will reject or not...