Ok, so first of all....major props to all of you who suggested that I try to do more free weights and total body movements. You guys are SOOOOOOOOO right on about it.
I'm still doing my circuit training, but I've added in some adjustments. Instead of doing the gluttes (I have no idea how to spell that word) machine, I'm doing lunges. I swear to you, I have never worked out that hard in my life! I did 75 lunges on each leg (broken up into my circuit) and my heart rate got up to 170! I was sweating and felt so many muscle groups working all at once. I felt it in my hamstrings, my glutes, my quads and even in my abs! It was awesome. I'm pretty sore today, but so proud of myself for doing this.
I'm also doing some chin ups. They're assisted chin ups, however. There's no way I can lift my body up at this point. I have about 90 pounds of assistance helping me.
I'm doing squats as well. There's this squat machine that I'm starting out on until I can get better. I did 3 sets of 15.
there's this other machine, that I have no idea what it is, but I'm doing it too. Well, I say machine, but it's not really. It's this thing that looks like an upright bench. You put your elbows on these pads on each side and grasp a handle that extends upward from those bars. Then you have to lift your lower body up toward your middle body. I can only do 3 sets of 5 on this one, but it really feels good to do even that. The first time I did it, I could only do 2 at a time.
As I get better and more balanced, I'm going to incorporate more free weights.
Thanks again, for all who offered your advice and support! You guys are awesome!