Girls, Is it ok for me to have gotten my period twice in one month?

On the bright side, I'm not pregnant. I've always been irregular, my Nov period start on Oct 31st/Nov 1st (it was somewhere close to midnight that I noticed) and my first Dec one started on Dec 5th but now it's Dec 28th and I have my period again. Is this just gonna count as my January period? I'm kind of concerned, I've read that it's unhealthy and abnormal. Is it something I should see a doctor for?
Girls, Is it ok for me to have gotten my period twice in one month?
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