I don’t know about the HIV aspect, I haven’t heard that, so I can’t tell you anything. I’m not a doctor. You did have unprotected sex so, yes, you are at risk for it. He told you that you’re his only partner, but people lie. You never know 100%. It’s always a good idea to get tested. That’s all I can say about that.
Now I’ve never experienced it, but I’ve heard about it happening to other people. My best guess is (again, I’m NOT a doctor nor do I have any medical expertise) that there was some bacteria on his junk.
Diarrhea is essentially the body flooding your bowel with water to flush out toxins before they’re absorbed into your blood stream. It’s a defensive measure.
There shouldn’t be any bacteria in semen, but it’s easy for it to collect on his dick/balls. It could have also been from your hands since I’m sure you used them in addition to sucking him off. So my advice is for both of you to thoroughly wash up before engaging in any sexual activity.
Another thought is that it could be an allergy of some kind? The first seems more likely. Either way, I’d try making sure you’re both scrubbed clean and if you still have the same reaction then don’t swallow it anymore! Obviously, your body is rejecting it for a reason. Have him ejaculate somewhere on your body or on your face, just don’t swallow and keep it away from your eyes!!!
