Wht's up?!
It happens, learn from it and make a better decision next time.
Usually, the virus 'keeps quiet' for around 2 weeks, during which an infected individual feels normal and is highy contagious, after this period ARS develops within 2-4 weeks in some individuals, so wht your husband is experiencing is totally unrelated to HIV.
On terms of HIV infection, I am assuming your risk was unprotected vaginal sex, you AND your husband need to get tested 3 months after YOUR exposure and 3 months after his with you.
In the meanwhile, you need to either abstain or use a Condom.
It isn't likely tht you got HIV from one unprotected exposure, so try not to worry and you can both test at 6 weeks to get a really good indication of your status. Test at 3 months for a final answer, this is necessary.
Smile.
=)
Best of luck to you and your husband.
Always use a Condom, I'm assuming you didn't, the 'fling' time.
Oral sex is not a risk for HIV, If you had unprotected sex with your husband after you had unprotected sex with your "Fling" then you are both at risk.
His symptoms have nothing to do with HIV, they would start 2-4 weeks after exposure and last 1-2 weeks. If he was at risk.
PEP is for people KNOWN to have have had an exposure with an HIV+ person
If you had unprotected sex get tested at the 3 month mark post exposure.
Hope this helps