Does Bloating, Back Pain And Dizziness Indicate Pregnancy?

after i had sex about a month ago i was realy worried that i might be pregnant as im only 15 we used a condom but about 2 weeks ago my period came and ended it was shorter than usual but heaver but i still cant help but worry, before my period i felt blosted had stomachaches and backache and felt tired and dizzy but was not physicaly sick. is there any chance that i could be pregant help much apreciated, thank you.