Please help

Shannan
Okay so I'm 18 and I'm trying to get pregnant but we did it on the 8 of feb. I have been getting really sick like I need to throw up but nothing comes up. I tired eating a muffin and I got really sick. I have been a lot more tired lately. My breast don't feel sore or anything. I tired a on the 15th of feb. pregnancy test and It came but negative.