My advice to students considering Natural Sciences would be if you are hardworking and have a drive for a challenge, you will find that Natural Sciences is exactly what you are looking for.
I used to stress a lot regarding my future because I never knew and still do not know what I would like to do. However, during my placement I have learnt that my fear for my future career derives from an unconscious belief that I must stick to one career for the rest of my life when in fact this is not true. Now I see my indecision as an opportunity to choose and embrace between many options.