Must Be the Mica
Don't replace everything in your regimen all at once. Make changes in stages over a period of a few weeks. This way if you have a bad reaction or see no improvement it's easier to determine the source of the problem.
Give your skin time to adjust, but if you have a bad reaction, stop immediately and go back to your old product & routine for a while until your skin settles down.
Don't be sucked in by someone else's excitement over a product, routine, or treatment without asking three important questions: How long have you been using it? What was your skin type and condition before you started? What other products or treatments do you use?