Late period negative

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I'm in cd 50. 16 days late. I tested 3 times all negative s.. I had brown spotting for days which i think old blood.. I usually have it beforw my period.. I thought i may get period after that but no signs of period till today.. Tmi i check my cm and cervix its egg white and medium.. I dont know what to do ladies any of u experienced similar to me please share.. Ur comment will help me..