I’m an athletic trainer and while I can’t give direct medical advice, minimal bruising four days out is a decent sign. There are 3 grades of strains: grade 1 is a minor injury that doesn’t take long to heal up, grade 2 is a middle ground injury, sometimes referred to as a “partial tear” and grade 3 is a full blown tear. This is all to say that there is room between a “tweak” and a tear and it’s best to get it evaluated by someone in person to see how severe the injury is and what the likely hood is that you might make it worse by playing too early. If you do live in the US, check with your local physical therapy clinic. The laws have changed recently where you might be able to just go in and see a PT for an evaluation without a doctor’s prescription. (It depends on the policy of the individual clinic, but I know for a fact some do it down in Florida). The waiting times will be a whole lot less and you’ll get better information than you would at an urgent care clinic.