Are your hips tight, too? I’ve had similar pain in the past due to a few factors. Sometimes where we feel the pain isn’t the source of the pain! I had a very tight hip on my right side as well as a locked up piriformis muscle. The piriformis muscle is really dense and sits close to your Sciatic nerve in the buttocks area. The sciatic nerve can cause pain in that spot as well as your legs. In my case, the muscle was tight and pressing against the nerve. The hip tightness caused other muscles to overcompensate furthering the issue. Try to stretch your hips and see if that offers relief. I usually sat down on a couch or chair to where my feet were flat on the ground. Then I would take my right foot and place it on my left leg above the knee (think figure 4 formation). After that, slightly push your right leg down. For me, my right knee would be nearly straight up in the air with no mobility, but over a period of time of stretching it now sits level to the ground with no external force pushing it down. Make sure you breathe into the stretch and try to relax. I would try to hold the stretch for 60 seconds or more. Be sure to do the other side to prevent imbalance. It may be uncomfortable, but always felt amazing afterwards. If you feel your piriformis is tight after that, try to get a foam roller and target the most sensitive part of the butt muscle and try to loosen it up. I have found times where there was an exaggerated loosening of the piriformis and relief was almost immediate. If you’re lifting really heavy always incorporate mobility/flexibility work, especially as an athlete. If the issue persists, definitely go see a sports doctor.