anyone answer this question because I need advice

Okay I need help! 

I am currently three day late for my period, I feel sick, I have heart burn that won't go away, I have cramps in my belly, I am absolutely exhausted! My smell is becoming stronger, and some foods are nocking me sick! My boobs are sore, and I'm going to the toilet more often...

But got a negative pregnancy test! I am so so confused? 

Any advice on what to do?