I would go with' definitely massive variety of opportunities still open regardless of what grades you get in which subject, obviously the better they are and more specific to the subject they are the smoother the way will be, but always many paths, avenues, routes through it all. You want to be speaking with a good professional careers advisor at your school, college, local library or civic building, getting an appointment and discussing all the specifics with them, because things change and there are many ways forward from any position or circumstance. Wishing you well.