Hi, around 5 months ago I  had unprotected anal sex with another random male. (I was the bottom) I went on PEP meds a couple days after the encounter and took the full 4 weeks. During this time around weeks 1-3, I got a big rash on my back and received treatment via IV steroids everyday multiple times a day until it dissipated. I have tested negative for HIV 4th gen both 6 weeks off PEP meds and 3 months off meds. 

I am concerned if I can still trust my HIV results with the heavy steroids they were giving me when I had the rash 3 months prior to my final test. 

Would the steroids I had received delay my HIV results to be conclusive?

I’ve also had a few cortisone shots in joints for injuries during this time which I am wondering if that could also delay my HIV results to be conclusive, or make it not show up on the test. I had a cortisone shot about a month after the encounter, another two months and on the third month as well. 

Could the cortisone shots I had received interfere with my HIV test if they were in close proximity?

I was also taking some supplements during this time, including biotin but I stopped taking it several days before my final 3 month post PEP test.

Would this have any effect on the test?

I’ve been sporadically using cortizone cream during this not knowing if it could have an impact, I could have had some on even when I had the tests done, I don’t remember.

Would this have any effect on the test? 

Can I trust my HIV results? I want to be 100% sure I don’t have it