Refuse to shake hands and fist bump with people because of HIV fears

Does anybody have specific fears like shaking hands or coming into contact with people? I lived my whole entire life without fears like these and now they literally scare the hell out of me. Constantly checking my hands to see if there are any “cuts” or abrasions that are present, all just to tell myself “that person you shook hands with could’ve had HIV and their blood could’ve gotten into that paper cut”. These are the thoughts that consume my mind on a constant basis. I won’t use a shopping cart at the grocery store because “what if an HIV positive person used this cart and they bled on it?”. Gas pumps and door handles are the same way for me. I look at the ground very carefully to make sure I don’t step on anything of metal or sharp nature. It’s like no matter what I do when I leave the house, I’m on a severe guard to protect myself against any and all things. I hate OCD so bad.