Messed up again

I made a mistakes at work again. It has been almost a year of working here. It was my first job and I didnt fully understand what I am doing right now. I felt like I wanna quit after 5 days working but I stayed until now cause I am more afraid to quit cause what if other company is more worse than this company. What if my colleagues and bosses is not that nice I mean worse than this. I felt scared and hopeless. I felt numb and I felt worst. I thought this year gonna be nicer, Im gonna be good but these two days broke everything. I made mistakes and last year of me keep on haunting me like I could see my old self making the mistakes and how people treat me at that time. And the fact that these two days worsen cause I dont know what to reply and react when my boss or colleagues bombard me with questions like my brain stop functioning and I felt like I wanna leave and quit. And it affects me afterwork cause right now I keeps one overthinks every single scenario and mistakes I have made.

And I wonder should I take my medicines which I stop taking almost a year