My first year of college i switched my degree around a few times and got Cs in a few classes, (those have been surprisingly difficult to work off- it was only like 4 classes at most) and it took me a while to really get going. My cumulative GPA is just above 3.0 and my total physics is 3.3+. I go to a CSU school in, well, california state, so its not the most recognized for physics. I want to retake the last quarter of chemistry, since i was absent one week and missed an exam and got a C, and I am pretty sure i could easily pull off an A in that class.
Anyway, every month or so I get really nervous about not getting into grad school and start looking at my options of double majoring in Computer Science, or just becoming a High School teacher.
I love physics and really want to get to a decent grad school. I have always wanted to go to a nice school since i saved so much for undergrad(practically free schooling at public schools

I need some reassurance that I have a future in physics. Is going to a not very well known for physics public college going to hurt me and what kind of grades should i strive for to be competitive. I would like to be competitive at schools like UCSD/LA or some UC school.
Anyway, thanks for the help/advice.