I have had 3 heavy periods in the month of December and I'm trying to figure out if I'm pregnant or not. My cycle is usually normal and I never had a irregular period. My first period came dec.2-5 the second one came dec.18th-21st and the last one came dec.27th until now which is dec.30th... I need help some one

It's pretty safe to say that with three periods in one month, you are not pregnant. I do think you should go and see a doctor. While periods go skip around and are not always regular three in a month is unusual enough that you should get it checked out, especially as they are heavy.