Morning sickness help

may

So I found out earlier this week I’m expecting baby number #5 on any of my other pregnancy’s I never had a day of sickness but I’m older now an was thinking that is why I’m so sick this time pls help me out I’m still very early pregnant an trying to hide it from my very clued in 15 year old daughter what is causing this sickness an why never b4 only on this pregnancy is it a good sign very confused about it all it’s the worst in morning an in evening middle of the day I’m like bin truck give me all the food