I need some help.

Okay here's the thing. For the past 1-1 1/2 months, I have been having nausea, my boobs have been hurting, and I've had a constant headache. I was supposed to get my period on the 5th but I took a test on the 4th and it was negative..... :( I'm not sure what to do. My SO is absolutely positive that I'm pregnant so he wants me to take another one Tuesday but I'm afraid for another negative........