Deployment brain!

I'm in shock. Not over him leaving, but how much this deployment took up in my mind. I am the one that does the bills in our family. It started when he left for BMT and it's always been that way. I say X is what we have left over after bills are paid and we make it work. We always have. I have NEVER missed a payment, even though not everything gets paid online. I always remember what we have to pay and when and how we go about doing it.
The only two things we don't pay online is his car (local credit union) and T-Mobile. Why we don't pay T-Mobile online? I have no idea. I have always gone into the store. Well we use the 15th check for the phone bill and I always make my way down to the store (and usually browse the mall) and pay it. Well last month.. I DIDN'T!!! I can't believe it. I was checking my mail today opened the bill from T-Mobile and noticed it was DOUBLE what it should be. It said "Late payment-due immediately". My mouth seriously fell open. I seriously cannot fathom how I forgot to pay the phone bill. I'm angry at myself and really embarrassed. I feel like this is my job as a wife and I failed. I know it's not a huge deal, but still.
We just got a surprise "hey you owe this much and it's 4x what you normally pay" because some idiotic credit card rep told us the wrong thing. So much for the extra deployment money this month.

Now I'm scared of what else I've forgot/will forget! :(