I think i have an std, but i am not sure?

so i had sex with a man i met outside a staples. he was fairly elderly and was handicapped, i didnt ask y but i assume now that it is because the stds. anyways now he is dead and i am not sure what to do. also, there were some goats involved and they are dead too. his anus was bleeding alot and he also used a LOT of heroine. what do?