hello and thanks for the query, A urine pregnancy test becomes positive 7-10 days after the missed period in women with regular cycles. Try to repeat the test after one week using the first morning sample of urine and a new kit. The burning and pain indicate urinary infection. It is commonly caused by bacteria. It is better to get a urine examination to check for infection and take drugs accordingly. The blood may be your period or come from a pregnancy [implantation bleeding ]. It is difficult to comment upon it now. I suggest you get a pregnancy test done to rule it out first if you do not get periods by then. Hope this satisfies your query. Thanks for using HCM. Feel free to ask any more questions that you may have. Dr Madhuri Bagde Consultant Obstetrician and Gynecologist