Last semester of high school I got a 3.3 gpa, but the second semester I worked hard and I got a 4.0, will a 3.3 ruin my chances of gettibg into a top college?
No. A GPA of 3.3 for one semester when all else is good (overall GPA, course rigor, grades in specific classes, etc.) will not keep you out of any particular college or university.
What did that 3.3 do to your cumulative GPA?