Hello Friend, Good that you are seeking a help. I can understand your suitation. Keeping away from loved ones is really a tough suitation. But career is also equally important for everyone now a days .
Such insecured feelings, racing negative thoughts are symptoms of Anxiety.
You may need a guidance of counseling support to bring such thoughts under control and get a different prepective about your problem and about the life.
Next Steps
Take a counseling support if available in your college or reach out to me online through Practo for further detailed evaluation and suitable solutions that you can follow.