As already suggested, this could very well have just been a nasty bout of the flu, as it more than likely was. It is the rare heterosexual woman that has HIV, even in some foreign countries. However, having had unprotected sex multiple times with 2 different partners does place you at some degree of risk- IF they were infected. The ONLY way to know your status is to test at 3 months after these exposures. (assuming you have no more exposures in between then and when you test.) Try not to focus on your symptoms- unfortunately, they will tell you nothing as HIV symptoms are very nonspecific and individualized. The only thing you can do is test at 3 months. I wish you the best of luck, and I hate to say this, but please let this be a lesson learned that it is NEVER worth it to skip condoms and place yourself at risk and make yourself go through so much horrible anxiety worrying. It's not worth it.
If you both got sick, with the same symptoms, you might have both just had something minor. (Flu is contagious). I guess ARS could take place, but what are the odds of both of you getting them at about the same time? I'd say you both had something minor.