Hello Amanda C,
Welcome...
My first impression of your leg routine is that you need more than 2 sets of each exercise....
Here is my alllll time favourite leg routine but it involves alot of lunges...maybe you could replace the lunges with leg extensions, but I guarantee that you willlllll be verrrrry sore for a couple of days after this one...
Leg Triset:
Lunges 5 sets of 10 reps (no rest)
Leg Curls 5 sets of 15 reps (no rest)
Squats 5 sets of 10 reps (1 minute rest)
Once the thighs and hamstrings are dead, you do 8 sets of standing calf raises picking a weight that you can initially do for 20 reps. Only rest 20 or 30 seconds in between sets. Do not reduce the weight! The last few sets you'll only be able to do around six reps only, but even when the going gets tough, make sure you pause for a second at the top of the movement and really concentrate in the contraction of the muscle.
Hope this helps.....