pregnancy test fading positive

first test was today friday and nothing seems to be on it.. second test was tuesday obviously positive.. , third test was thursday .. i know this could maybe be a chemical pregnancy but i have no signs of anything like bleeding or loss of “pregnancy symptoms” my boobs hurt and im a little achey but not sure.. gonna take a test in the morning to see for sure.. ik i should go to the dr but they are booked out two weeks in advance. what should i kind of expect from a chemical ive never had one