@Mpmd
I have been exactly where you are. You will get there. It sounds from your posts on 12th and 13th that things are improving. It is totally normal to then have a few worse days and feel completely back to square one. You are not though, you have made progress and are still adjusting to the medication.
I found that when I had a worse day it fuelled my anxiety as my brain focused on the negatives, I will never get better etc.
It is a bumpy road with ups and downs but the downs quickly became less frequent and less deep, and once I could see that it really helped.
Keep writing down how you are feeling and look back at the them. Your post on 13th is fantastic. You could see the light, you had hope and felt more like your old self.
I understand that right now all that hope has gone again, but that is the illness. You are taking steps to get better and you are getting better. You will see the light again, more and more until its back full time.
Maybe even later on today you will look back at this mornings post and feel a lot different.
I have been through this a few times. It is hell, but you are doing amazing and you will get there.
I know it is hard when your brain is in overdrive with negatively but thinking that you "should" have done things differently like getting help sooner is not going to do anything to help.
You are where you are and you are doing so well. I am beginning to learn with CBT that when my brain is thinking "I should have" that I can try not to engage or dwell on it.
I know that maybe isn't possible when you are in the middle of it all, but worth remembering when you are feeling better.