Panicking and i need help

Hi everyone! I just need to take talk to someone because i am very lonely at the moment. So my cycle ended on March 4th i had casual sex with a guy on Tuesday 7th and Saturday 11 March. We always used a condom from the very beginning and at the end he finished on my chest both times. Even if it didnt come inside me, i checked for holes in the condom before putting it away and apparently it was fine. Anyway right now my period is missing and im feeling strange, for example my boobs are very sore and i also feel dizzy and nauseous sometimes. I will take a test asap to put my mind at ease but for now i just wanted to talk to someone and maybe be reassured :( am i okay in your opinion or are there any risks or pregnancy?