Based on your description, the situation sounds anxiety-provoking but the actual risk of
HIV transmission here is extremely low to negligible, because HIV does not survive well outside the body and transmission requires direct injection of fresh infected blood into the bloodstream, not indirect contact via moisture, container, or surface; even if a used syringe was present, simple proximity or water contamination does not create a realistic transmission route; also, PEP is effective only within 72 hours, and since it has already been ~4 days, it is generally not indicated now; importantly, taking PEP does not interfere with rabies vaccination, but in your case it is not required based on this exposure; what you can do for reassurance is a baseline HIV test now and repeat at 6 weeks/3 months, but medically this is a no-risk scenario, and your current distress seems more related to anxiety than actual infection risk.