Welcome to Healthcare magic forum,
First confirm that ur pregnant by doing urine preg test at home. If ur pregnant then u cant abort by jumping or exercise, u have to consult ur doctor and if the pregnancy
is within 40 days(count from 1st day of ur last cycle) then with medication u can abort. If its more than 40 days u have to under go MTP
Since ur teenage girl my sincere advise, dont have unprotected sex till u get married.
Always prevention is better.
Hope I have answered ur question,