Oh, ok. Well are you prepared to have a baby? Have a stable job/income? Health insurance? Married or in a stable, long-term relationship? Have a home/safe place to live? Have a degree or some form of continued education? If you don't, then you need to be preventing pregnancy until you are prepared and ready to have a child. Children need parents who are ready/prepared for them and children are not cheap. There are a lot of birth control options available that you can look into. I would make a doctor's appointment and discuss which option would work best for you. Take care.
My cycle is 26 days and AF lasts 4, 5 at the most. I'm not ttc but were not trying not to either. We want to let things happen naturally and try not to plan it.
The brown spotting could have been from irritation from sex. The cramps could be ovulation cramps, but it seems too soon to be ovulation, though that also depends on how long your cycles are. Stringy, 'egg white' discharge is a sign of ovulation. It also doesn't matter if the semen comes out minutes after sex, because sperm have tails and they'll swim to where they need to be. Are you trying to get pregnant?