Am I taking too much?

I was reading a bit about adderall dosage, and they kept saying that in some instances a 3rd dose may be required.  Then it dawned on me that I'm taking 4-5 on some days.  Should I be concerned?  I metabolize this stuff like it's water unfortunately, and I only get about 3 hours out of each SR dose.

Right now, assuming I wake up in the morning (I have a variable schedule), I'll take 12.5m adderall SR when I wake up (8:30AM).  Then about 3.5 hours later I take 25mg Adderall XR, then about 7 hours later I'll determine if I still need to get things done, in which case I'll take another 12.5mg followed by a 5mg dose before I go to bed if I'm rebounding and can't sleep (in low doses adderall helps me sleep).  If I don't need to do anything, I'll take 5mg-7.5mg to reduce rebound.  Particularly on days where I work at night but have appointments in the morning (in which case I'm up at 8:30AM and going until 1-3AM), I end up taking the full 12.5/25/12.5/5.

Now, I don't always have days like this.  Some days I'm not up until noon, or I don't have to work in the evening, so I'll end up doing 12.5/25/5-10mg.  So my dosage ranges from 42.5mg-55mg depending on the day.  But I never really take less.

I think what really scares me is how much I dislike being off of the medication.  I crave the calm.  I'm severely ADHD, and the hyperactivity in particular is so uncomfortable.  And I hate the mental fog so much that I just never want to have to deal with it.  I just cannot stand that constant low level mental and physical discomfort.

I also have found myself drinking a lot more than usual, and I think I'm doing it to help ease the rebound at the end.  I don't have any desire to drink while I'm on adderall (historically I've been a binge drinker...mostly to relieve the ADHD), but once it ends I find myself drinking again to calm me down again.

Would love some feedback.