Can a pinch on my back transmit AIDS?

Dear Ask The Doctor: Hi Doc, This is Anshul Raj from India.am 30 years old and am Healthy. I have a query which is making me unstable since 3 days . I was riding my scooter way to home at night and i saw an old man asking for help. He asked me to drop him to his doc's clinic so i gave him a lift to his doc's clinic, while i was taking him there a few minutes later i felt as if something pinched me on my back. At first i didn't cared for that but when i got home I could still feel the touch of that pinch. I am getting thought's whether that person had not infected me with HIV. Its the third day since then and i can still feel the pain when i press where i felt the pinch on my left hip.. please let me know what to do.. i'am getting nervous day by day with this thought. Although i was wearing a pair of jeans that night i am still very much confused about it. please help me.

Dear Anshul: HIV is not transmitted through touch, sneezing, sharing glasses, utensils or any instruments. You also can't receive the infection by sharing swimming pools, washing facilities or toilet seats. You need not be concerned about receiving the infection from the old man with mere physical contact, not involving any exchange or deposition of infected fluids.