Might head to the hospital...

Last night went out with friends and noticed my underwear was SOAKED. I told my boyfriend I was nervous it may have been my water so we came home, showered and sat around a bit waiting to see if I was still leaking after my shower. Didnt seem to be leaking anymore after my shower but we ended up having sex and going to sleep. I've woken up several times feeling like I'm going to puke and this last time woke up whimpering in pain and with a headache. I have no clue what to expect this being baby #1. My back and belly definitely feel really crampy but my belly isnt always hard with the cramps. I'm taking a bubble bath now trying to relax but I do not feel well at all. 36+5 weeks ftm