A week after my missed period, I had 2 days of moderate bleeding. Then, after 3 days I had brown and pink discharge on and off for about a week. I should be at 8 weeks 3 days right now. All my positive tests are super faint, slightly and slowly getting a wee bit darker. I'm getting more symptoms progressively, but the bleeding and faint positives are worrying me. Any experiences or advice? Could this be a chemical?