You had unprotected sex and need to test for HIV at the appropriate times.
Oral sex is not a risk for HIV but is for other STD's. You should also have yourself tested for these.
Symptoms are NEVER used to diagnose HIV.
I am not a doctor, but your sore throat and yeast infection COULD be a sign of an STD, but they could also have nothing to do with an STD. The point is, only your doctor will be able to diagnose you.
I am more concerned with your blacking out when you standup. I remind you that I am not a doctor, but this condition is fairly common and is called orthostatic hypotension. Here is a brief description of this condition and it must be brought to your doctors attention as soon as possible.
Orthostatic hypotension — also called postural hypotension — is a form of low blood pressure that happens when you stand up from sitting or lying down. Orthostatic hypotension can make you feel dizzy or lightheaded, and maybe even faint.
Orthostatic hypotension is often mild, lasting a few seconds to a few minutes after standing. However, long-lasting orthostatic hypotension can be a sign of more-serious problems, so talk to your doctor if you frequently feel lightheaded when standing up. It's even more urgent to see a doctor if you lose consciousness, even momentarily.
Mild orthostatic hypotension often doesn't need treatment. Many people occasionally feel dizzy or lightheaded after standing, and it's usually not cause for concern. The treatment for more-severe cases of orthostatic hypotension depends on the cause.
Please see your doctor.
I wish you the best
RW