First of all try to avoid intimate relations, you are growing up and not even attain age of 18,and you should be careful about such relationships.
Regarding the present situation this symptoms dose not seems due to pregnancy
. These are panic and anxious reactions. But still if you want to be sure do a pregnancy test if you miss your next monthly cycle. But as mentioned earlier refrain from such things, there are many things you can have except pregnancy because of unsafe sex.