Sure sounds like a muscle tear to me. In the spring of 2019 at the gym I tore the right quad doing squats. Two years to heal, and only this fall has the right quad started to not feel tender to the touch. I never allowed it to rest completely, as I continued to ride, however I did stop doing squats, and will not resume them with heavy weights.
Seeing a doctor will likely be informative and is a good idea.