Are these shoes walking shoes or fashion shoes? You said yesterday you bought wedges from R&B, wedges are not walking shoes.
Are they leather outer but synthetic lining? If so you may be allergic to the lining. But if you have walked any distance in them in the heat we have had today it is probably your own fault for making a silly mistake. Don't do it again, if you have to go for a walk, wear the appropriate footwear. Consider yourself told and next time don't be so daft.