IUD for almost 5 years

Tiffany
Hello,
I've been on IUD for almost 5 years, I vomited last week from having only 4 beers and ever since I cannot stand the thought of it and the smell of cigs. I was a smoker myself but I can't stand the taste or smell of it now. I tried eating chez it's crackers at work, didn't like the taste......ice cream.... Didn't like it. Also I really love pizza and now after eating it, I get nauseous. 
Then I had a really strange dream that I was peeing on 7 of pregnancy tests and they were all positive. It woke me up needing to go to the bathroom.... 
What does all this mean? 28 uhere with one 4 and half year son. I don't want another baby for awhile but it sure seems like this is happening.... Please help?