One unknown guy sucked my penis with out condom on 31 may 2018 and spitted saliva and rubbed his penis in my rectum without condom. He told me he is trying first time. For me as well it is first time. In till I had burning sensation in my forehead penis later it went, but after 2 days I'm getting bubble or lymp in my rectum and burning sensation I'm feeling. Can you tell me what kind of test I need to take. Or when to take take test to find out whether I'm infected or not.