When me and my girlfriend were practising oral sex for the first time, she complained of a sore throat, neckache and temperature fever etc afterwards.
Could there be a problem with me? or is it normal for the first time? 'coz now i'm paranoid about sex!
There is no link between performing oral sex for the first time and becoming ill. It is very likely that you are associating two events that are unrelated. In other words, she probably had a flu coming on and nothing more.
If you had a communicable disease, there is no way that she could have caught the disease and become ill right away. All diseases have an incubation period. So, relax.