Hiv risk and testing

[sadgirl92]

Hello I am a 30 year old female who wants to know if I’m at risk and if I should continue testing. Around September I was with a man who’s hiv status is unknown. He tryed to insert his penis in me, several times but I recall not letting him. I didn’t want to have sex without knowing his status. I don’t recall if he inserted his head, I think he didn’t , but anywho I ended up testing for a peace of mind 27 days later after that encounter. 4th generation hiv  test came back negative. My question is, is this considered conclusive based on my encounter. I also want to add that i was diagnosed with Erythema nodusm a couple weeks later, Idk if the Erythema Nodosum was something happening months prior to that encounter, and I  am pending a rheumatologist apt. It might be possible that I have a autoimmune disease. If that’s the case, and if I did have an exposure with this man, does that mean that I would have to retest. Would an autoimmune disease cause antibodies to delay?
Thank you so much for your feedback

[AnxiousNoMore]

You are supposed to wait for 28 days for conclusive but I imagine you're pretty good with 27. Sounds like there was no insertion so no risk anyway. The test is not affected by anything except chemo drugs and you don't take them so the test is accurate for you.