"Morning" Sickness

"Morning" sickness....ahh, what a familiar term to me these past several weeks. But I'd like to know one thing - who coined the term morning sickness? Because they obviously haven't been feeling like I have. My sickness is more like "all day but gets worse at night" sickness. Everyone says that its a good sign because it means my hormone levels are high, so I should be thankful. And I am. There have been a couple of days that I've felt o.k., but then I've gotten a little scared thinking it might mean that something has gone wrong. So I have to pray against being fearful of miscarriage because I know that fear is not from God. My doctor said that 90% of people get over morning sickness by the end of the first trimester...I'm praying I'm in that 90%!!!