Thanks for the replies
почему ты такой вредный сегодня...чай еще не выпил?
I know the reflexive verb concept.... it just that I wasn't sure how to MAKE it reflexive. Yes you usually add -ся but not always, there are exceptions, and I wasn't sure if потерялась is a word because I was with my iPhone when I posted this, so I just left it "unreflexive" since it's anyway irrelevant to the crux of my query. But I don't wanna make the thread about that now, though thank you for the sharp observation :P The thread has fulfilled its purpose.