I usually start my cycle around the 9th every month in December it came early on the 5th and was brown blood the whole time. I cramped the week of the 9th when I should have originally started then got a pg test on the 17th and it was negative. So on dec 31st I started bleeding again first brown then red covered tampon first day then barley covers and then brown a little red mostly brown. I don't understand I had unprotected sex nov 28 that's y I took the pg test should I try one again?