Diedre,
Believe me I feel your pain on this one. My now 10 year old daughter would not sleep in her own bed when she was 15 months old to around 24 months. She would throw up, give herself diarhea, scream, cry anything that would make me pick her up and allow her to sleep with me. I was so frustrated, I talked to a sleep specialist and this is the advice they gave me. Read read read, put her to bed about 30 minutes earlier than normal and read to her, then sit there close to the bed until she fell asleep, gradually moving the chair farther away from the bed each night. I literally would be sitting in the hallway until she went to sleep, we also used magic water, a glass of water that would keep bad dreams away,(which is still next to her bed every night) For the first couple of weeks we were also told to give massages, with non scented oils so she could only smell our scent and would be comforted. This did take awhile, but it gave us some great bonding time, and now she wouldn't even dream of sleeping in my room. The only personal touch I had was that I put a picture of the family next to her bed in a soft frame so if she wanted to hold it she could.
I wish you the best of luck, I know it is frustrating, but it does get better.