Red spot on breast

I get these spots often and every time I have a panic attack and start thinking it’s cancer and eventually I forget about it and it goes away. I do have an appointment with a dermatologist on the 13th of next month but I’m not sure if this is worth scrambling to make an appointment before then?

I’m wondering if it’s just a pimple? I am guilty of wearing the same bra multiple days in a row, and to sleep. Does anybody else get these spots?