Am I pregnant or not?

Rawaa
Hello ladies, I have a question and can't stop thinking about it.. 
my period should have came 4 days ago and it didn't, I made the home pregnancy test today and it was negative 😔
Should I wait more or do the blood test? 
My back is hurting me and my stomach too and I feel nausea my breast is hurting me and I lost weight, 

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