seroconversion

Does a "trigger point injections using Lidocaine" and a one shot of cortisone steroid supress the antibodies that may cause you to have a "false negative" my exposure was Jan 11th 2008 my Negative HIV test results came on April 7th which is 3 months. I am concerned of the possibiliity of a false negative
Lets review my symptons
Jan 10th- unprotected oral, anal, vaginal sex Jan 10th 2008
Feb 14th- Stomach virus
Feb 15th dry cough- chest x-ray shows (walking pneumonia)
became tired, confused, dimenia. (didnt know where I was)
slept for 1 month for 14+ hours a day
given Levaqiun and another anti-biotics + tramadol
March 15 burning pain in body extreme pain) pain clinic gave performed trigger point injections in my back
using Lidocaine pain still hurt so doctor gave me one shot in the arm of cortisone
pain still hurt referred to Nuerologist who gave me "Lyrica"
burning pain is extreme in Fingers, different parts of body not going away
loose stools, consipation or diarehea
Tested Negative for HIV (3) months after exposure
the only 2 symptons I have is burning pain in body mostly in finger, and loose stools, constipation and diahera given Atropine o.o25/ diphenoxylate 2.5 MG tab but did not help alot
Please give me any suggestions thank you,

[HSci34]

No, virtually any drugs will surpress your immune system. The ones that are often cited are immunosuppresants or chemotherapy, and even then, it's not necessarily the case.