Weird discoloration???

Laura ā€¢ Mommy to one angel, Lexie Grace. 10/21/16. šŸ‘¼ Rainbow šŸŒˆ baby Noah born 08.06.18
I have these brown discolorations that seem to have popped up overnight...one on my forehead and others on my back. Kind of worried...scheduling a dermatologist appt next week. Any idea what these discolorations may be??