Downfall of Diazepam

So ive still been feeling realllly shitty, generally down and blue but tonight I was feeling really detached from reality, which only really happens at the peak of my panic for a few seconds, but this happened without panicking. It was really unsettling unpleasant and honestly I felt hopeless and awful :(!! I was convinced nobody could help me.
So turning to the only thing I had, diazepam, I took 1 2mg tablet and told my partner how I was feeling.
I came home and told my parents how crappy and not myself I felt. Basically grabbing at straws because at this point I genuinely thought I was losing my mind.
However;
Could It be the diazepam?
Remember my mum saying its like methodone?
I told her the detached and black moods I was feeling and she told me to look up the side effects. Obviously id done this before taking them but faced with sheer terror, youll pop anything.
Depression is a side effect as is trembling which at the moment im shaking head to toe and cant control it. Not a panic tremble but twitches from my hands, thighs and stomach. Obviously the tablets arnt agreeing with me on a physical level but could they be interfering with me mentally?
When these things eventually wear off will my mood be lifted or can I attribute the feelings to being out of work and having quite a few panicky moments recently which have disheartened me and made me question how ill cope with another job, how ill get there ect?
No idea but fingers crossed ill feel better in the morning. Its 23.53 and im feeling quite tired.
x o x o