G.B.
Don't beat yourself up so much!!!
Even if you had taken the general ed classes back then you'd have to take some of them again. They redo the gen. ed. requirements every few years and sometimes the class number changes, such as Intro to Psych might be 001 for 10 years and listed on the gen ed requirement page then they update the classes and it's 101 now. The old gen ed class doesn't fill the requirement now because the class is 101 instead so even if it is the same exact class you'd still have to take the class that the number matched. Plus they are always changing the requirements around.
You will do fine, just take it slow, take some easy A classes the first semester like tennis, aerobics, cooking, choir, weight training, photography, etc...they are basically classes that if you show up and participate in you get an A. These will fill in between the classes that require homework and lots of studying.
After your first semester or two you can do more core classes if you are up to the challenge. I made nearly straight A's at Jr. College and got offered full scholarships to full Universities due to my doing all my semesters like this.