So, you are correct that you can get pregnant from precum and that the pull out method does not work to prevent pregnancy. However, I would not equate your spams and symptoms to be anything to do with pregnancy. You do not immediately get symptoms if pregnant. However, timing wise, sperm can live up to a week inside of you. I'm trying to figure out the timing you are referencing. But you say you got your period? It's impossible to exactly know when you ovulate. You can make an educated guess but it is always just a guess because we can have an off month and ovulate late or early. If you haven't gotten your period yet, wait to see if it shows at the right time. If not, then take a test. But I will say in all seriousness, I sincerely doubt you are pregnant. good luck