Is my palatal expander causing me to have nerve damage as I now have pain when I bite whereas I didn't before?

36 year old female. Non surgical palatal expander put in 4 weeks ago. Tried biting softer foods, but there's pain now where there wasn't before. Molars feel loose. I'm concerned that the tipping of these teeth are causing nerve damage. I get braces in a week where I will continue to have the expander in. I'm terrified that this will cause more problems in the future.