Welcome to HCM.
During both occasions you wore condom. The oral sex
with a girl, the risk of HIV is negligible only.
But your HIV test
has to be repeated once again after 12 weeks after your last risky contact to make sure that you have not been infected.
Your symptoms of red marks may be due to some allergy
and not likely due to HIV as the oral coitus is not risky.
So you consult a Dermatologist
and get treated for the present problem of red spots and get tested once again with his guidance.
You will be alright very soon.