I’m going into my senior year and haven’t taken (and do not plan to take any senior year) any AP classes, my gpa is only a 3.3, and I haven’t taken the SAT yet.
I feel like even with a high SAT score it won’t make up for my low gpa and lack of AP classes, so is there even a point in me applying to colleges now?
Yes! There are lots of colleges that can work for you. CC can make it seem like everyone had tons of APs and amazing GPAs, and those are needed for the tippy top colleges. But there are many colleges that you could attend. Get signed up for the SAT, and get the blue book from the SAT website to study from. I know there is a thread going right now on where GPA 3.0 - 3.3 students are going (on my phone so hard to find now, but maybe in the parent’s forum). Figure out you financial situation, possible majors, and geographic constraints, and post that info here for suggestions.
Of course there are!!! Lots and Lots and Lots of schools will be happy to accept you!!!
I have a friend who had a 3.2 GPA (with pretty good extracurriculars and recommendations) and still got into NYU, Rutgers, and the University of Toronto. THERE IS STILL HOPE! Numbers aren’t everything, and you can always take a gap year to do some research, internship, or community service to reapply next year 
I know how you feel! Looking through College Confidential can definitely skew your perspective about what most students are doing in high school. Let me reassure you that there are options for you. If your school has a college counselor, take advantage of that resource and ask for some help in the search. If not, take to the web and you’re sure to come across schools that will be a good match for you. It’s not too late!
It’s not that unusual to wait until fall of senior year to take the SAT, particularly if you don’t have the funds to take it multiple times. And while it isn’t high, a 3.3 isn’t that low for an unweighted grade. Most of the GPAs people put on this site are some sort of weighted GPA.
If the SAT goes poorly, then you might have more problems, but even then, not all colleges care about the SAT score. In addition, going to a community college for a few years and then transferring is always another option.