HIV is instantly inactivated in air and also instantly in saliva so it is effectively dead and can't infect from oral or kissing so you didn't need to test.
No one in 40 year HIV history got it from kissing or oral sex, so after 40 years the science is very well established, so nothing you can add will make your situation a risk.
Likely the headache and tiredness is in your imagination since you fear death and the natural tendency then is to over-analyze your body looking for clues. Only your doctor can tell if you have another issue - it can't be HIV though, so you can move on from that fear.