Should I take the after pill?

I was with my boyfriend having some oral sex and in one moment i was kind of sitting on chest and blowing him off but he doesn't like me swallowing his cum so i finished it off with my hand he came and it was a lot of semen it even got on my neck and his whole stomach and some got near my knees after that we both wiped our hands with tissues and then wiped it with sanitizer wipes twice because we were in a car and we had no tub to wash our hands. Then we checked if i had any semen on my panties but i had none (i was wearing them while blowing him) after that he started touching me after maybe 5 or 10 minutes of cuddling he had his hand mostly on my clitoris but then i starting rubbing it with him and I squirted then he told me he wants to feel my vagina on his shaft only (we never had actual sex) so i only sat on his for 10 second but he said he felt nothing (we did no rubbing or grinding and he had his boxers on but i didn't have my panties on) then he got dressed and started touching me again (he didn't touch his penis at all) Questions: -Should I take the morning after pill? -Can semen stay in my nails or hand even if it was dried and wiped with sanitizer wipes? -How long can sperms stay on my hand even if it dried up and can it become alive again if it turned to glue like substance then exposed again to fluids? PS. I am in no place or time to get pregnant and I was during my most fertile day (12 days after my previous period started) and that night after i was with him in the morning I had lots of viscous slightly yellowish but transparent vaginal discharge i had to use many tissues. Was it from the sexual excitement or ovulation or other reasons?