I've never been pregnant but my mother who was pregnant six times (one miscarriage) had morning sickness extremely early with my little sister. My mother always had morning sickness bad but with my little sister it was extremely early. She swears it was the morning after. Anyway she thought she had eaten something that disagreed with her and took Pepto. This went on for a couple of days until she realized it was worse in the morning. The preverbial light bulb went off and she stopped taking the Pepto and waited to see if she missed her period.

Even though my mother was skinny she didn't show until she was 6 months along.