Blood borne disease

Patient: I had a dirty hit from a syringe about 4 years ago. the needle was clean,but my hands were dirty from taking out the rubbish bins.after the hit , i pulled a long ‘worm – like hair’ from my vein and and since then i’ve been pulling a short 3-5cm long ‘hair’ from my tongue every few days.i had a blood test but nothing came up.