help me please!

This is my third pregnancy. I'm 10 weeks tomorrow. I started out with the usual morning sickness, no big deal. Well that morning sickness turned into not being able to eat anything or drink anything. Everything came back up even meds. Then cue the horrible migraine that left me bed ridden because any sound or light made my head feel like it was going to explode. Finally I was able to go to the hospital and got 2 bags of fluid and told I could take 2 Tylenol every 4 hours and Zantac every 12 hours. I thought finally id start to feel better...nope. Visited my doctor and got put on zofran every 6 hours as needed and told to drink pop daily along with the Tylenol and Zantac. This was two weeks ago..I'm still not able to hold anything down. My migraine is still as bad as ever. I can barely move because everything hurts. Anything with a smell makes me throw up and now (TMI) I haven't used the restroom in 3 weeks and the meds they told me to take are not allowing me to go either. I have lost 13 pounds in one week for a total of 20 in the past 3 weeks. My lower stomach into my back cramp so bad I'm in tears. I don't know what to do because my hospital and Doctor won't do anything besides tell me to take my meds as directed. Has anyone else experienced this?! How did you handle it?! I need to start feeling better because I have two children ages 4 and 2 that need me and my fiancé works second shift. Someone help me please! :( I can't take much more of this!!