I think I am one of few people who actually felt relieved at Step 4...setting it all out, taking personal inventory of myself and digging deep for stuff I may have overlooked...this was like spring housekeeping of the soul.
Sure I cried, I felt many emotions as I went through it, but by the time I got to Step 4, I had 3 strong steps behinds me and I trusted the process. I also had a wise and kind sponsor to help guide me through this step.
I found that it wasn't good to force myself to do any step before I was ready. It helped me to do some pre-work first on each step, writing out what I was hoping to find as I worked the next step and preparing myself spiritually to go through it.
Take your time, work with your sponsor. Yes, it's an emotional step but it shouldn't be frightening or overly painful.
Good luck.
Hugs