help: teen pregnancy

hey im a 16 year old who had sex 5 days ago with a guy, protected of course but the condom broke once but he saw and pulled out straight away before getting a new one. i know i could really just be paranoid but my period is due in 1 day and usually by this stage my boobs get sore and everything and i'm just so so fucking scared. is it too early to get a pregnancy test ??? when should i get one ???