My meatus has been red for about 11 days plz help! Anyone have the same issue?

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I took a 10 panel sti test right after I saw it and everythibg came back negative. I’ve been on immune suppressants for over a year and have been pretty stressed out this month before noticing this so im not sure if it could contribute to my problem. it doesn’t hurt to pee and it usually doesn’t bother me when its flaccid just a little bit uncomfortable when erect. I’ve been trying to avoid activity and I’ve been taking doxy 100 x2 a day am on the 5th day. it used to be pretty sore in my urethra when it first started but it seems like its starting to hurt less. just wondering if anyone has had anything similar to this before? thanks