Sounds like maybe it's time to change your oil and filter. (It's been 4 months and untold miles). See your local repair shop near you:
Use this link to find some shops near you that can help with your concern:
www.repairpal.com/repair-shops
RepairPal Certified shops can diagnose and repair your 2017 Nissan Sentra. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.