Am I crazy?

So last night at my pilates lesson, I mentioned to the teacher that I was sore in the arm region because of my yoga class on Sunday. And then I mentioned that Tuesday was usually a lifting day, and I didn't know how that would work because of the soreness. And then she was like "so you do pilates, and yoga, and you lift...that's kind of a lot." And then I realized that I also bang out 45 minutes of cardio 5 times a week. So I'm wondering if my current schedule is becoming too much? Because right now, at least Monday - Friday, I feel bad if I don't work out twice a day. Which is a little scary.

Here is my current sched:
M: 45 minutes of cardio, pilates lesson
T: 45 minutes of cardio, 20-30 minutes lifting
W: 45 minutes of cardio, pilates mat class
T: 45 minutes of cardio, 90 minute yoga class
F: 45 minutes of cardio, 20-30 minutes lifting
S: pilates mat class (when I have time I walk there and back, so that's an hour of low intensity cardio)
S: 45 minutes lifting, 90 minutes yoga (starting last weekend...until then all I did on Sunday was lift)

I will point out also that I eat at least 1800 calories a day, and this crazy schedule that started in late September/early October hasn't caused me to lose a ton of weight or anything...maybe like 3 pounds. So I don't think I'm too nuts. And I mean what else do I do after work during the week? I make dinner and watch TV or read. It's not like I have kids to care for or anything. Although, I'm thinking that now that I'm getting into more vigorous yoga I might scale back lifting to only once or twice a week instead of three times.

So thoughts? Am I crazy? Do I do this because I seriously heart living on a schedule? The answer to that last question is YES. I love schedules. But seriously, is this abnormal and crazy? Because I don't want to be crazy.