Black Out （１）瞬間的な失神（２）一時的な記憶喪失

I had black out yesterday.
It was the second time that I had it during daytime.

I can think of some reasons.
And I see the sequence or how it happens.

1. lack of sleeping for a couple of weeks
2. take 2 sleeping pills instead of 1 the night before
3. drink alcohol during the day
4. blackout
5. came back better
6. go back to 1.

Yesterday, I was with Yamako.
She helped me a lot.
She called my part-time work place and explained that I didn't feel well.
Then she called a taxi and took me to the bed.
She missed her appointment at the clinic she really needed.
I feel bad.
How can I stop this?