HELP!!!

Kristine • After 6 years ttc, we are finally pregnant. I have an 8 year old son and have been married for almost 10 years.
My morning(all day) sickness is so bad. I have lost more than 10 pounds in the last 6 weeks. I have been admitted to the hospital once for dehydration! I don't stop drinking water all day, I constantly have a glass in my hand. I am dizzy all the time because I can't eat without throwing up. Movement makes it worse. On top of it all, I am sooo constipated!! I haven't pooped in like 5 days! I drink fruit juice and I try to stay away from extra iron. 
NOTHING HELPS EITHER IF MY PROBLEMS!!  Any suggestions would be much appreciated!!