Hpv changes in cervix

I’ve had a hystoscopy biopsy fine and colposcopy biopsy is fine but there’s hpv changes, my smear showed nothing abnormal so gynocologist has suggested smear in 3years all because my lining was too think, can this change over time to cancerous ? Will I get a warning first so it can be detected early? And will this be why my lining is thicker than it should be?