Fall Applicant Expecting Rejection

Hi,

I am in my 3rd year as a community college student in California, and I have had very lackluster grades in my time so far, all together my gpa currently is 2.8. Last fall I applied as a Computer Science major to SJSU, SDSU, and Pomona, as well as UC Merced, Riverside, Santa Cruz as some long shots, but my GPA then was 2.6. But I got a D last semester as well and I figured it was guaranteed I am not being accepted anywhere. I’ve calculated that I can raise my GPA to 3.0 if I can do well this semester, but I was hoping somebody could help me make sense of what I can do now? Can I apply for next spring semester to transfer or do I have to wait for fall? And are UCs out of the question now? Im really nervous that with my major no one will accept me now.