Definitely do a test and then you will know. A lot of what you are saying is similar to pregnancy symptoms and the bleeding may be implantation. If the test is negative and your are still worried it might be worth seeing your DR.
I would go go the doctor because it could be implantation bleeding and not a true period. I say that because I had the same type symptoms and sure enough here I am 17 weeks pregnant with twins
Have you taken a pregnancy test? Some women do have bleeding when they are in early pregnancy and doesn't necessarily indicate a problem... Definitely take a test first thing in the morning and see how it comes out. Good luck!