Did steroids cause you to be depressed?

I am one week past my third TCHP infusion. Up until now I have been doing very well by my/the oncologist’s standards. I’ve been so grateful for the way I’ve tolerated treatment.
I’ve been cold capping and have most of my hair. My doctor told me I look very healthy and she’d never know I was going through chemo.

I have been remaining positive and have a strong support group of family and friends (husband is in the picture but we are not “together”). My kids are doing well since I’ve been able to care for and engage with them this whole time.

Here’s the thing, my mental state took a big turn this week. I noticed it right when I was finished taking the steroids post infusion.

I have lost all hope. I’m depressed. Anxious. Sad. I keep thinking about not seeing my kids grow up. I thought I made it through this phase when I was first diagnosed. I’m right back in the darkest of places. I am on an ssri for the first time in my life. It was helping. Now it’s not.

Why can’t I keep my attitude up when things are going fairly well with chemo? Heaven forbid I have a setback. Will I fall totally apart? I feel so emotionally weak.

Has anyone else made a backslide like this? Could it be from the steroids? I noticed my mood really shifted after this round’s steroid dose was over. Does chemo induced menopause cause this type of mood change?
I’m really struggling.