Help!! Not sure products I’m using are suitable for me

My skin barrier got damaged after trying on many new products at once. Now I’m in the process of repairing the damage skin. However I am still unsure about using sunscreen. I started getting tiny bumps every-time after using sunscreen. I’ve tried double cleansing too but it is a bit too much for me.

I have normal/combo dehydrated skin. I don’t wear make up, I only apply sunscreen one or two times during the day, so does double cleansing a must? I have iunik sunscreen spf50. Please can anyone advice me. Thanks