I suddenly started feeling really sick last night and ended up violently throwing up?

which I was really dreading. I did not eat very much so came as quite a shock and really hurt my stomach as after a while I did not have anything left to throw up except bile. I have been feeling so weak and my stomach and ribs are so painful. I found when I was feeling sick that lying down on my bed made me feel worse and I ended up curling up on the bathroom floor exhausted from puking my guts up, I just felt like crying, it made me feel so rough. I was wondering why it makes me feel worse lying down and how to get rid of the horrible sick taste?