I am a Chinese student,male.Yesterday, I went to my school hodpital to have a 13 weeks rapid test.It was negative. But after I drawn the blood, when I was putting the cotton swab on the needle hole for several minutes, I want to change a cotton swab.So I asked the doctor vbehind the window to get a new one.He put a pocket of swab on the desk.I got it.There is no problem I know. But there is a used swab near the pocket.(A Indian foreign student drawn the blood before me,And you know,India has many HIV patients)If I used his swab to leave aside my needle hole,assuming that he has hiv, am I at risk?