WOKE UP WITH SHORTS WET!!

I woke up this morning around 6:00 Am and noticed my shorts seemed extremely wet (all around vagina and butt area)! I thought I had peed on myself from a dream so I checked the sheets & cover but they were dry. I went to the bathroom to check my shorts but they didn't have a urine smell just went as if I peed a little. I had unprotected deep penetration missionary sex with my boyfriend a hour or two before going to sleep. He came on my stomach. Had period earlier this month so I'm pretty sure I'm not pregnant . IS IT PROBABLY JUST SWEAT ORRR???