My boyfriend and I started having sex last month, and have a very healthy sex life. However, twice after having sex I have woken up in the middle of the night to a very wet bed. It isn't urine, and it's always on my side of the bed. It smells different than my usual discharge, but similar. It's extremely wet, doesn't dry quickly, and is a little sticky. My boyfriend says it's definitely not coming from him, and his boxers and side of the bed is always dry. What is going on? It's mortifying even though my boyfriend has been really sweet and understanding.