Possibly pregnant?

I’m really scared and just anxious right now. I haven’t missed my period yet, but I feel off. My boyfriend definitely came in me and I’m not on the pill or anything. I usually feel my period coming a week before it does, and I feel nothing. I’ve taken a pregnancy test and it was negative, but honestly it was too soon. My breasts have become really tender and I can hardly touch them. I also get waves of nausea and no explanation to it? Any suggestions or just comments?