Negative tests but all the symptoms

Michelle
Hey ladies. Last year I miscarried in october. I've been feeling really sick lately. Almost exactly like the last time. I can't stand eggs, throw up every morning and my back is killing me. My last period was July 23 so I'm now 8 days late. 2 negative tests. Last time I got pregnant it took me almost 7 weeks to show positive. Is this a bad sign?