Your long email explains your worries. Don't get panic.Rapid HIV test
showing negative result after 6 years of intercourse defenetely rules out HIV. 4th generaion elisa
will give accurate result. But at this stage rapid tests result will do.
Don't get confused wiith false negative result and all. Your dermatological complaints seems to be due to seborroeic dermatitis
. Have a consultation with a Dermatologist