Whats wrong with my immune system? Im 19, I'm 71 kgs, I eat healthily, I exercise regularly, I get enough sleep (8-10 hrs), Im not overly stressed.. But in the last 2 years I have got sick every 3-5 weeks with recurring symptoms. I don't get majorly sick, infact I have only been sick enough to stay home form work or university once in the last 2 years, I just get really swollen lymph glands, that flu feeling, sometimes a blocked nose, and pressure in my head. Always exactly the same symptoms. I did something stupid with someone (had unprotected sex), but I have since had a STD screen and was cleared of everything. My concern is obviously in regards to STDs HIV, but I have been cleared of that. What is the chances of getting a false negative?
What else could potentially cause these symptoms? I could have vitamin d deficiency because that appears to be hereditary. This is the only part of my life that stresses me. What do you think?