Could I be Pregnant?

My bf and I dry humped the day I ovulated he had nothing on and I had my thin underware on. He put the tip over my vagina but panties were covering the opening it went in very lil. He had not cumed before just was hard and I was super wet. I took the morning after pill 17 hours later. Could I be preg? Maybe from possible pre cum? 1 week later 5 days before im supposed to start my period my boobs hurt horribly and I'm peeing allot. Is it just nerves or what?