Confused

Okay I had implanation spotting 9dpo and was nauseous for two days after that then absolutely nothing no symptoms....AF is 5 days late with no signs of showing up and still getting BFNs. ...I find I get hungry again maybe an hour after eating and been having ALOT of gas and fluttery butterfly feelings every now and then....I had some discomfort the day AF was sapposed to show but went away.....could I be pregnant? Its Driving Me crazy