It takes most women 10 days past ovulation before then baby implants into the uterus. After it implants, you body then starts to produce HCG, which in turn creates pregnancy symptoms because your body has a surge of hormones. So I think most likely you are getting worried, and the more you think about it, the more your body can start to trick you into different symptoms. Just wait untill you are due for your period and test then. Good luck!