I know what you mean, @Saz345, and to a large extent I shared your apprehension, but I found the sessions really helped me to process the raw feelings and talk about things I needed to say. They have become the space each week to sort through those very particular emotions.
I didn’t feel worse. This surprised me too, a bit. Instead I felt better - not instantly, perhaps, but by degrees. I’m not ‘over’ losing my mum but I’m massively better than I was a year ago.
I’m not saying everyone will have the same experience, of course - if you tried a few sessions and didn’t find them helpful, you could stop. But it might be useful with a good counsellor.