wrong nursing assessment. help!

like 2 weeks ago, i saw my patient's chest for the first time when i was gonna give him his heparin shot on the abdomen. i noticed red dots that looked like petechiae to me. i asked the patient if he always had those red things and he said no. then i asked my nursing supervisor to check it out and she said it definitely looks like petechiae. so i called the doctor and relayed info and he ordered to d/c heparin, so i did. then last week i came in and checked on him and asked him if he still had them. this time he saw exactly what i was pertaining to and he said those are his moles!!! i was like, omg. i dont know what to do. i asked a coworker if i should call the doctor and ask for it to be ordered again and he said just to wait on his next monthly labs. aaahhhhh idk what to do. i need some good advice please. im so scared to call the doctor cuz he might yell at me for making a big mistake! help please