Consider biomedical engineering.

Think about whether you want to spend your life working with people or working with machines. Then the choice is a lot simpler.
If you can’t make that decision, You might also want to consider BioMechanical Engineering where you can design machinery in direct support of medicine.

If your decision is between mechanical engineering and medical school, I wouldn’t want you to be my Doctor.
But this is a decision no one can make for you, you have to go where your heart takes you, cause whatever you decide you are the one who has to go through it and benefit from it. One thing you have to take note of is that if you decide to go to medical school, you wouldn’t start earning good money until you are atleast 30.
I am a mechanical engineer, but if I had to do it all over again, I would choose medical school.
GOOD LUCK!!!

I started as a premed biochemistry major, then switched to mechanical engineering.
Physician is a more rigorous field; the internship is much harder. The decision to switch wasn’t based on difficulty though; it was the realization that I simply wasn’t good enough with people to ever develop an adequate bedside manner. I prefer machines because I have direct control over what happens, and they always behave the same way in the same set of circumstances. Ultimately, go with what you are going to love to do.

Look into whether the medical schools you are most interested in accept mechanical engineering as the under grad major. I know there is some flexibility as to what undergraduate degrees you can have, but I just don’t know how much. Always easier to decide as you go, until that point of no return comes. You may also be able to pick study classes your first two years of college that can be applied to mechanical engineering or pre-med degree. In that case, you will have more time to make your final decision also. You have to be decisive, but it never hurts to keep as many doors open as long as possible, without impacting your overall length of study of course.

Like advanced math……differential equations and derivatives of functions? won’t be doing much of them as a doctor.
Like human anatomy and biology and pharmacology? wont be doing much of them as a mechanical engineer.
look into biomedical engineerign or genetics engineering for a sort of blend between the two.

Which do you like more? Lots of math, or lots of stress?
If you like math more, do engineering, America needs engineers more than it needs doctors.

If you can’t decide, my opinion won’t help you. But an MD looks good after anyones name and on your bank accounts.