I don't think that you're nuts. I do think you're probably fixating on this recurrent pimple/rash. I'm not sure what you think these outbreaks might have been, but I they don't remind me of anything serious. The feelings of warmth and so forth also don't sound significant. I think you're worrying, is all. Try ignoring the symptoms and see if they go away. If not, then I guess you'll have to see a doctor.