Take PEP.
If you forget to use a condom or it breaks, or if you share injecting equipment, have no shame, and get PEP (Post-Exposure Prophylaxis).
You take PEP medications for 1 month to prevent HIV after a risk. PEP needs to be started within 72 hours after a risk, but it is better if you can start within 24 hours. You can get PEP from Emergency Departments of most public hospitals or at sexual health clinics and some other doctors.
For more information or visit www.getpep.info
Check out this video for more information on PEP.