Indulgent emotions?

I’ve had a couple coaching sessions on my upcoming visit with the MIL and how I can show up when she and my husband don’t follow my manual. At the end I found myself in tears. I think it’s related to my fear of failure and my sadness that my husband doesn’t follow my manual and have my back when his mom is here. I am someone that pushes down emotion until I burst. I want to get better at feeling. Are these things ok for me to feel sad about? Or considered indulgent and I should just focus on changing my thoughts?

Thank you