Any thoughts?

I had a positive Digital Test I called my clinic they did a urine test and it came back negative i told the lady I had a positive test at home and it was a digital one she completely ignored that and told me I wasn’t pregnant because their test was negative they didn’t even want to do a blood test. I let it be. I started spotting that same day and by the next it was more like a period so I was like she was probably right i wasn’t pregnant. But sometimes felt off my period usually last 7 days this only lasted around 5 at least the heavy bleeding and ever since I’ve been spotting dark brown I’ve been like this for 12/13 days. I called my clinic and told them I wanted blood work done because this is not normal. Im waiting for the doctor to call me back but in the meantime I want to know your thoughts ladies.