My boyfriend and I had unprotected sex on 7/7/19 and I had a spotting 7/14 but it wasn’t a full period. I am now 7 days late and have taken 3 tests and all have come back negative! I work at a restaurant and have never had a problem but tonight every time I walked into the kitchen all I could smell was grease and I checked with a few girls and they couldn’t smell it..I have also been super tired and very nauseous. Could I still be pregnant despite the negative results?