pregnant but

Hi y'all I need help. I Had a (lighter) period last week but recently I've been super tired, using the bathroom constantly (#2), nauseated, bloated, and I've been having period type cramps almost like my period is coming again. My husband and I haven't been actively trying for a baby but we aren't using protection either. I took a test about a week and a half ago because I had been sick but it was negative then I started bleeding. Is there just a stomach bug going around or should I be worried about something else?