I thought I was crazy until I found this forum! I'm a 29 year old female and I have been suffering with this condition since I was 27. Within thirty minutes after orgasm I have the following symptoms and they usually last two days.
Headache (not throbbing)
Neck stiffness
dizziness
off balance
extreme fatigue
feel like I need to lay down,very hard to stay up
brain fog
Feeling out of it
sometimes slight nausia
My symptoms are bad enough to keep me in bed for two days. I'm probably forgeting some of the symptoms but these are the worst ones. It happens every single time I have orgasm. I also get the same kind of headaches after a high paced workout. My neurologist just doesn't seem to take this seriously and told me to take IBprophen which doesnt help at all.
I saw that someone mentioned that this started when they got CFS and that is exactly what happend to me. When I was 25 I got MONO and that turned to CFS so they say anyway I was bedridden for two years, I'm now 29 and almost back to my old self but this POIS has been going on for two years. I never had the orgasm problems before getting ill so it must be linked.
Other than these problems I'm in great shape. I eat healthy. I'm not sure what to do besides stop having sex which I pretty much have and don't work out to hard

I thought I should mention that I take Xanax for anxiety.
.25 x 3 a day