for awareness and sex education

hello po just want to ask this qs po. ty po sa sasagot

1. ano po ba ang window period for hiv testing ng 4th and 3rd gen also how accurate po ang results?

2. may instances po ba non reactive after 3 months exposure then mag positive ng ika 6 months? naguguluhan po kasi ako some clinics sinasabi 6 months window period, some are 3months and some are 30 days.

3. saan po ba nagsisimula ng bilang sa unprotected sex or protected sex po?

4. is it possible din po ba na magtransmit even using condom?

history: may bf po ako and first ko po siya. we had unprotected intercourse nung April and June. by that time nagkaroon ako ng hiv/sti/std scare tho walang cheating or anything nagkaroon lang ako ng anxiety kakabasa and may mga naging symptoms ako so nagpapatest ako mula august-september. 66, 89, 90 days of exposure using 3rd gen sa social hygiene clinic and sail clinic resulting NON REACTIVE, ika 92 days of exposure hindi pa rin ako mapakali nagpatest ako ng 4th gen sa hi precision resulting NON REACTIVE.

nung august and october we had intercourse pero protected siya using condom and we're practicing safe sex now but still nag ooverthink pa rin ako.