I'm in the same status, processing. My problem is that my credit card month is close today, so I might not have the required available credit tomorrow :'(
If I were you, I'd do the pickup, and after is confirmed, canceled the current order.
Oh wow. You should make a payment to bring down your balance ASAP!
I have more than enough credit available on my card. That’s why I placed the in-store pick-up order. Even if both charge at the same time, I would be okay for the time period of needing to do a return for one.