help help help plz answer !!!!!😥

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I have done ultrasound with two diffrent doctors in ultrasound result it shows that I have conceived  and am 4weeks pregnant but urine tests and blood results are negative!!! Also, having lower abdomen pain with some brown discharge !! So confuse and nervous !! Plz share if that happens to any one !!!
 I am trying for 8 years for TTC!!!😢