HELP!!!

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.