What are the % chances of contracting hiv with insertive anal sex with a condom if the receiver was actually hiv +? (same condom was used for oral/ no reputure, but was not water tested). how would these odds change after a neg 4th duo at 4 weeks?

Re-check at month 3. . For safety would use a new condom for every sexual encounter i.e. a separate one for anal and a separate one for oral as there may be subtle tears that are not visible. Would also discuss PEP treatment/ PreP with a provider or local health department https://www.cdc.gov/hiv/testing/index.html https://www.cdc.gov/hiv/clinicians/prevention/prep-and-pep.html