Pregnancy

My bf and I had sex twice yesterday and once on Christmas Day. Both without any form of conception I.e. no birth control, withdrawal or condoms. Since Christmas day, I been nausea, loss of appetite, cramp on my lower abdomen, headaches, backaches, fatigue, cravings for all things salty and been drinking more water than usual. Also today, I been running back and forth to the bathroom with diarrhea and vomiting. I have been drinking Water to make up for the loss of fluid in my body due to that. Along with that are cramps in my lower abdomen in both sides, extreme back pain, having thus gloomy feeling over me and tiredness as well. I was wondering if these are possible signs if pregancy or worse. I haven't taken a test yet because he works all the time and I wanna be with him when I take it.