... had my period for like 3 and a half weeks and it was terrible so i went to my obgyn and told him i wanted to change it but he told me that i had to wait to my period came so they can insert the iud so i didnt get my shot but ive had unprotected sex twice after my period was over but i got the morning after pill twice and now use condoms , the whole month of july i didnt get my period but i had symptoms of what i thought was my period coming like cramping and lower back ache and hip ache but still no period should i be worried? Or does it just take a while to get my period after im done with the shot?