vaginapagina | Two Periods in a month (Reply)

Last month I had two periods in one month. I gotten my first period on December 7th and it did last for 6 days, nothing weird about it, no stomach pains no nothing. On the 23rd of December, I gotten horrible pains and felt like mirgaine headaches, getting my period then again. I'm not taking any type of birth control at this time since last April but I'm going to see my doctor this month about getting some BC. I didn't have any type of intercourse until just recently last week and it was protected sex. Does anyone have any idea why this happened in one month? They were both normal and both last 6 days. I'm freaking out a little bit and not sure if I should take a test or something or why this happened. Thanks!