semen? what do you do?

okay so we have been TTC and I find I'm quite unsure what to do after sex. with my first kiddo I was on the bc pill and we used condoms. somehow she made it. this time around I'm actively trying. so I know this probably sounds stupid, but what do you do with the semen? If we have morning sex and then need to go to work, do I just let it slowly seep out all day? I hate feeling wet. I always used tampons instead of pads for that reason. what do you do? and if we have sex at night again what is the clean up process? how long am I supposed to just let it hangout before it's okay to try to clean it all up or not let it leak everywhere?