On Sunday the 19th I went to er and my HCG level was 24 then on Tuesday it was 74 then again I went on Sunday and it was 983 and then Monday it was 1900 and I'm only 2 weeks pregnant does that mean I'm pregnant with twins? Or is it a high possibility?

Only way to know would be to see what shows when you have an ultrasound. There is a wide range of what would be considered normal at different weeks of early pregnancy. Is there a particular reason for the frequent checks?