These symptoms are in no way consistent with any sexually acquired infection.
Please do not worry.
Please get back to me if you need to.
Your risk of STIs would be associated with unprotected sexual intercourse - if you are not sexually active in this way you have no risk at all.
Sounds to me that you have a problem with anxiety more than anything else.
If you feel you have been exposed to any STD then for sure get tested.
Your symptoms are not , at all , consistent with a HIV infection never mind full blown AIDS.
There are lots of treatments now for HIV - so much so that it is now regarded as more of a chronic illness , like diabetes. Certainly I have quite a few of my own patients with HIV and none have died in the last 10 years since I took up my post.
Can I ask what symptoms you have and what sort of x-ray you had?