At least two to three weeks after a missed period, a doctor can do an examination internally to check for changes in the uterus and cervix.
You need to look at the facts and not let your imagination run away with you. By now, any pregnancy would be quite obvious. You didn't even have sex based on what you said. Pregnancy is not magic. Certain things need to happen, which I mentioned in my initial reply. My advice is to move on from this and hold off on having any sexual relations until you are better educated about sex and have confidence in what you are doing.