My chances at premed

I took three classes my first semester. I ended up getting a B+ in astro C10 and math 1A while p/np-ing the third. This semester I’m taking bio 1B, physics 8A, and math 1B. I’m scared I’ll end up getting a C in physics while getting B’s in my other two classes. Is my GPA still salvageable to be considered my med schools, and if so how difficult would it be to do so?