Hey Pandora, it is Grama-Herc

I don't have the epidural/memory loss connection, but I have a couple of thoughts

As Batgirl pointed out, it may be stress related. Whitewolf mentioned the driving on auto pilot.

Once I was released from the hospital/treatment center as an inpatient, I had to drive there every morning. It took 45 minutes to get there and I hated every mile of it. I was scared, it was always dark and the traffic was horrible--early morning ya know! There would be many mornings where I simply did not remember driving to the center, or I would suddenly become aware of the fact that I was further down the road than I thought. I told the therapist at the center and he was very concerned about what I told him, but never said another word about it to me. He just let me continue to drive "unconcious" every morning.

Another T. explained that I was using every inch of my brain to get through the stressful time-what ever it was, and that my brain simply could not process or retain anything else. He actually said I did not remember things because I never knew them. I never noticed them, never heard them. My brain was just to occupied trying to get me through the day minute by minute in 1 piece to retain anything else.

Guess it makes sense when you think about it