Hi Tae, Upper Michigan here. Wish I could tell you I'm a success story, but far from it. First hurt Rt Quad early November. Stated pt late December then retore it Dec 30. Better get it checked out ASAP would be my best advice. About a month into my second round of pt my therapist found something she didn't like last week. Namely a divot about the size of a golf ball above my knee cap. Don't really have any signs of being re injured, but I'm not an eternal optimist after the last 4 1/2 months either. I'm a mid 50's male that physically active.
Not trying to be a doom and bloomer, but I kinda found out the hard way that your not as healed as you feel. Good luck