Def drop one of the classes asap. Go to prof office hours and the tutoring center. Join a study group, try forming one if one doesn’t exist. Go see an academic advisor and next semester, try not to pack in all very challenging classes. Use the pass/fail option for a class if possible, but maybe save it for next year because most colleges don’t let students have too many of those. Make an appointment to see a counselor at the counseling center, right away. As soon as your schedule frees up, or now if possible, get involved in some campus activities. Volunteer, you will def meet people.
It’s still early days in college. You aren’t a failure, but I think you bit off a little more than you could chew. Don’t beat yourself up. You can do it.