Early pregnancy symptoms? Please help!


I am experiencing spotting only when I wipe that is brown and seldom red. I'm also experiencing some dizziness. My cycle was expected to start on August 16th but I started spotting a couple of days before that and I'm still spotting now only when I wipe. I took a test 2 days ago that was negative but I think it was too early. What do you guys think or have you experienced anything like this? Please help!!!