Hello there. Ive been diagnosed with BPD and have reocurrent empty feelings everyday. Im on Lamotrigine ( 150mg) since May and 2 weeks ago ive been added Sertraline (50mg). All my mood swings vanished but i still have LOTS of anxiety (mental and physical) which really inhibits me from enjoying life and the present moment. 

I have this reocurring empty feelings (which i know its BPD related but i want to know your experience) but they dont last very much. Suddenly i can be texting or watching some video, or doing whatever and that feeling of emptiness and doom take over but last only seconds. Maybe a minute but no more than that. If i concentrate hard enough i can make it go away but sometimes i cant. It feels like my chest is void and suddenly life lost all meaning and joy and im here, thinking "what the hell am i doing right now" and feeling extremely depressed, concentration goes to hell and i feel stuck in my mind for some seconds and then, it goes away. This also happens at nighttime the most and yes, at night it can last long minutes and sometimes wont go completely away. 

Anybody know if this is anhedonia or the typical "empty" feelings people with BPD have? Its truly horrible because it appears out of nowhere and completely destroys my present moment and makes me feel doomed as long as it lasts (which typically its just seconds but intense and depressive seconds)

Thanks!