Help! Pregnant after miscarriage?

Help help help! I had a miscarriage starting on January 4th. Lasted until January 12. Had a NATURAL miscarriage and confirmed miscarriage with Doctor. I was five weeks and four days along when I moscarried. There was only a gastational sac, and no baby had formed. It is now February 17th and NO PERIOD! I took tests latter my miscarriage and the line disappeared slowly each and every day until negative. I took a test yesterday, as I still have not gotten my period. It was negative and after six hours I saw a VERY faint line. So today the same thing happened, took a test in the morning and after six hours later it turned faint positive. When I first was pregnant before my miscarriage, thie same thing happened: i took a test and it was neg and in the morning it turned positive. Happened for a few days until there was a strong positve. Could I be pregnant again? Help! I haven't gotten any bleeding since the 12th of January.