IndiaRubber

I have always been interested in medicine and it is my chosen field of study... but recently, i've been reading a lot on theoretical physics and mathematics and it seems far more meaningful in the larger span of things ( and by this i mean the workings of the universe - i'm not underestimating the work of doctors/surgeons here at all). This being said, it seems to me that I have neither the ingrained mathematical ability nor the solid basics ( have been to 9+ schools with different teaching systems) to study such things... or to one day study biology/chemistry to the advanced level I'd like to because of my average maths skills ( afterall advanced biology is essentially chemistry, advanced chemistry is physics and advanced physics is math...) ...which begs the following (perhaps naive) questions that I would be delighted if you could try and answer: 1)do you think excellence in mathematics -and thus science- depend mostly on ingrained ability, or is hard work and some ingrained competency enough? 2)can anyone hope to understand complicated concepts or in anyway affect our current understanding of the workings of the world and its constituents without a strong understanding of mathematics? 3) I am 18 years old and unlike some of my physics/math buddies, I cannot derive the Shrodinger equation or churn out complicated proofs of x=y. I have completed high-school level work with a good understanding of it ( especially in biology) but that's about it. Does this mean that I will never achieve anything particularly meaningful in my scientific career? I want to excel in whatever I am involved in and I feel I might be able to given the right guidance, but I feel incredibly small and stupid compared to the other 18 year olds out there who are physics-math people "from birth" and are already beginning to touch at the threads of a universe that, as a future surgeon, I am worried I will never really grasp or add to. Sorry about the unclear layout of my post and "basic-ness" of my question. It's been a hard month. Thank you (: