I have and IUD. I've had it for about 18 moonths now. I have been experiencing symptoms of pregnancy such as throwing up, severe mood swings, fatigue, frequent urination, things of that sort. I took a test about 3 weeks ago and it was negative. My symptoms have only gotten worst. I had something that kind of look like a period but it wasn't its normal thing. I was told this was like a 99% effective birth control so if that's so am I knocked up??

Maybe try another test. If it's still negative and the symptoms continue I'd call the doctor.