Trying for 8 months now.

Kelsey
My husband and I have been trying for 8 months now. I'm not suppose to get my period until July 16. For the past two weeks Iv been VERY nauseas in the morning. Iv thrown up 3 times and can't hardly eat anything without getting super full from just a few bites. I have a horrible metallic taste in my mouth. I sleep all the time. And Iv been having sharp pains in my lower abdomen. I haven't tested yet. 
Not sure if im pregnant or if stress could affect my body this way. 
Any advice would really help!