PLEASE I NEED HELP **update**

***Update*** I mustered up the courage to talk to my mum, she was understanding and got me a test, it was negative. I'm so relieved. Hello there, ladies. Please for the love of god help me. I am two weeks late on my period and that is NOT normal for me, when my period was due to hit I got really badly sick with diarrhoea and near vomiting, I was out very badly and was on a lot of medication. I don't know if it's because of that my period hasn't turned up yet... or... before I got sick me and my boyfriend had unprotected sex, but I swear to you up and down he DID pull out. I know for a fact he did. Please can someone help me I am so utterly terrified of being pregnant I'm am not ready. Please someone, please help me.