hi on tuesday 2nd of september i started having a light brown discharge then went to drak with hint of pink only when i wiped lasted to wed then i had some pink thursday now its gone im really tired and i also have sore boobs and niples when i lean my hand on them there so sore could i be pregnant?? period was due 3rd of september and im usually so heavy taking a period thats why im worring?? i have had unprotected sex too ! someone help please going out my mind