Realising you chose the wrong stream or course is far more common than students think, and the good news is that it is usually fixable, either by switching or by adjusting your path forward, so it is not the disaster it feels like.
First, understand your options for switching. In some cases you can change streams after Class 10 or early in Class 11, or move to a different course through fresh admission or lateral entry. Some colleges and universities also allow branch or subject changes within a course under certain conditions.
If a formal switch is difficult, remember that your final career is not locked to your current course. Many people build successful careers in fields different from their degree by learning relevant skills and using postgraduate options, professional courses, or entrance exams to change direction later.
Focus on building the skills and knowledge of the field you actually want, alongside or after your current course. In many industries, proven skills matter more than the exact degree.
Talk to teachers, seniors, and counsellors before making any change, so your decision is informed rather than impulsive.
Example: A student who disliked her stream could not switch immediately, so she built skills in the field she wanted through courses and projects, and moved into it successfully after graduation.
One practical tip: Do not panic or drop out impulsively. Explore switching options calmly, and if that is not possible, start building towards your real interest through skills, because your course does not have to decide your final career.