Girls: i'm embarrased to ask this :$?

You could have had an allergic reaction to something which is causing your stomach to hurt (lactose intolerance could have set in or something else) the sticky white liquid happens to most girls, its most likely that when you got wet from your boyfriend you that some of it dried a little bit and hasnt came out until now. Its nothing to worry about and its perfectly normal. There is no chance of you being pregnant from him you and your period should come soon. Best of luck!