For no reason at all..

Hey guys..I have been doing pretty good these days regarding PMO restriction. I mean not perfect in meeting my own goals but yeah I'm making some progress.. until yesterday. I didn't relapse or something but I just woke up and I having this feeling of suffocation for no reason at all. I can't study or do anything useful and I don't even have the motivation to do so. I know all of this can be nonsense for most of you guys but I really don't know what to do with this . I'm literally feeling like I'm chocking right now with tons of mood swings.
Is it just me ?? If anyone had the same problem during reboot please tell me how to cope with it. Thanks