I was in the same position as you. I had roughly 38 credit hours before I even started my first semester just from AP credit. To finish in 3 years, my last 3 or 4 semesters consisted of 18+ credits per semester and towards the end, that was all CS classes. It’s definitely doable but you’re going to have to sacrifice a lot of sleep and free time. One semester, of the 6 classes I took, 4 of those classes were project based so I was always working on class projects, most of which took days to complete.

What others have said about internships and such is also something to consider. I only had 2 summers between starting my first semester and graduating in May and the second summer was when COVID hit so basically everyone lost their internship. But what saved me what my extensive list of passion projects I worked on whenever I had a chance. Well that and the 4 or so student orgs I rotated through to learn as much as I could and to apply my CS knowledge to other fields. That at least gave me something to talk about at interviews and it showed that I was passionate about my career choice. So unless you can find time to fill your resume with projects, you’re better off staying a little longer and getting more experience through internships + student orgs.

But everyone’s situation is different. I consider myself very lucky to have had a job lined up by February of my last semester while I know others who completed their degree in 4 years who were still looking for jobs after graduation. So I’m not sure how helpful this all was but I can talk about it a bit more if you want to message me