Firstly i would like to tell you is Believe in yourself.
Next is that if you have option of changing your stream now I would recommend you to figure out in which stream you are interested in and than further talking it out with your parents.
If you are interested in science stream and as off now you are not able to cope up . I would like to suggest you to be regular with your study.Keep trying.
make a schedule for yourself , allocate time to each and every subject you have.
you can start with the topic you like first this will motivate you for studying further topics.
ALL THE BEST.
Hello dear student!
If you are finding science very difficult and you have no interest in science then you can talk to your parents about that and change your subject to humanities or commerce as per your interest. There are many good scopes in these subjects too and it is just a myth that only science has scope. So you can take steps regarding this.
All the best !
You can try to change your stream if you are finding science difficult and are not so interested in it, and if you are interested in making a career in science then you should get proper guidance from expert teachers who can help you explain the concepts and develop interest in the subject for you.