Hello, guys and girls.

I have been diagnosed with a severe depression and I have started taking Mirtazapine yesterday. I have some concerns about it since, I have experience with other antidepressants. I know the side effects can be severe at the begining and I wanted to know if anyone else has been in my shoes.
I slept through the day (18 hours) and I missed going to the cinema with my girlfriend. I feel like a shit now and I am super anxious and stressed out. I am feeling paranoid now and I feel like some self destructive thoughts arising. I also can't seem to focus at all and it is hard for me to write this or navigate at my house.
Do you think this is normal and will go away or should I call my psychiatrist?!?

Thank you and stay safe!