Where's my baby !

Okay ladies I need help. I had a miscarriage in 2014 and haven't been able to conceive since. In may for my finances bday we got busy!! However at the end of may I had a 4 day period on schedule with a lot of clear fluid filling the pads. June came and I haven't had a period but now i have pressure but not cramps and since last week I've been spotting dark red and brown on and off. I'm sick to my stomach and I can't stay awake to save my life. Decided to take a test today and it was NEGATIVE ! Could the test be wrong?