I do not know the type of course to study in the university. the subject know most is mathematics?

Question

i love physics and chemistry. I am also good in these subjects. i also love working in the laboratory because i love practical works

Answer 1

what about biomedical science? I know that they tend to have to do modules in maths, physics, etc

I study clinical physiology and its good if you like bio, but also has physics and chemistry modules and it has plently of practical work as you carry out cardiological investigtions such as ECGs

Answer 2

Your case is typical of thousands of students who finish high school each year ! On the bright side, it shows concern for your time and money; in this regard,  you are a rarity among a huge populace of "going with the herds"!

I'd advice to go for more courses at the community college / university of your choice in the areas which complements your areas of interest  at high school.

Take advantage of being there to talk to your instructors and classmates ( the seniors, please) about their assessment of future job opportunities in their majors. No matter which courses you take the first year or two,  stay on top of them and go for the A's ( high B's aren't bad, either. NO LOWER!!!).  

Gradually, you yourself, will reach to a conclusion. I've done it  this way and I 've benefited  a lot.

It goes without saying thanks go my teachers and professors !!!  Best of luck .