dont know whar to do

I just recently was on the depo shot but I didn't go back for my second dose that was due on June 22!!! I had sex but unprotected we both had nutted....I have been feeling everything since then been feeling like I has to throw up which I did my stomach been hurting I have been feeling cramps and having a headache....I don't be want to get up n do nothing...I have going to the restroom doing both...I don't know when I can test because I don't want to do it to early.. we have sex june27 and never stop we want to have a child...I need help