Heavy Flow

Wow this is kinda new to me. It's my second day of my period and I notice I have a heavy flow right now compared from the past periods. I have had light periods for the past two years since I'm on birth control pills. Today is different. I don't know why this is and it worries me a bit. I hope there is nothing serious inside me since I don't feel anything different at all, not even a single pain in my abdomen. Sigh. I can't help to be worried for strange things happen to me for I am not used to having heavy periods anymore.