On Dec 6-9th of this month I had my normal period had sex right before I got my period and since my last period I have been having sex with out birth control or a condom now I am having another period on Dec 27 and it is really dark blood but still kind of red. Is this implantation bleeding or am I having a second period in the same month?

I am always on time for my periods and everything never have I been late or to early nor had two periods in the same month.

If you had recent sex, it may be from that. Implantation bleeding, if you were to notice it, is usually more slight spotting for a day or two. Since you appear to be trying to become pregnant, wait and see what happens when you would normally expect your period for January. Good luck!

Stress and a sudden increase in sexual activity can both cause your period to go off wack and even come on prematurely.

It sucks, but sounds like you will have to wait it out a few weeks before you can get a definitive answer.