HIV risk question. How much risk?

Hello Doctor, Please read my situation carefully. I took rabies booster shot from government medical. The syringe was already loaded before patient came. They kept vaccine loaded syringes in a open plastic container. One ice packet is also in that container. I saw 1 used syringe without needle also in that container. So my vaccine loaded syringe and one used syringe with ice packet all are in a same container. The container is got moisture water due to ice packet. How much risk of HIV is here ?? If that used syringe is contaminated with hiv blood and mixed with the moisture and touch my syringe needle, how much risk ? My concern is all were in a same container so i am very much stress now for this incident. Don't know what i will do now. Please help. If i will take hiv pep now along with rabies vaccine does it also reduce the effect of rabies vaccine antibodies. Please help.. the incidence was 4 days before.