Too early but I have no will power

Hi ladies, I'm new to this App, so far it seems great and this discussion board  is so much better that the last one I used. 
​I tested BFN this AM with FMU at 7dpo as I feel awful! Nausea and feeling weak, cramps, and crazy dreams! I think I'm over analysing my symptoms already, I have a DD and DS, so TTC#3 and both of those pregnancies I knew by 9DPO I was pregnant because of nausea. I had extreme hyperemisis (sp?) and was signed off work I was so sick. 
​Maybe I have a bug or flu but I can't help thinking this is it...? 
​Wish me luck, baby dust to all! Xx