Although we the readers do too, and I’m still wondering where the other / last six regenerations went.
We went with the explanation in Last Night:

DOCTOR: No one could survive that crash.
DOCTOR: I did.
OHILA: No. We restored you to life, but it's a temporary measure. You have a little under four minutes.

Time Lords can clearly be so badly damaged that they can't regenerate.

The Sisterhood's drink fixes this.

So the Time Lord/Lady carries on as normal. Like someone getting CPR and then carrying on as before.