I am a man of many injuries, anyone else?

So in the winter of 2018 I hurt my upper thoracic region in my back from dead lifting. This has been an injury I am still trying to recover from to this day. It also caused my lower back to feel weak.  
In the fall of 2019, I was extremely active. I was hiking mountains, playing hours of soccer straight, and going for long runs. The catch? I was doing it all in crappy shoes. Towards November of 2019, I began to feel some pain in my legs. A sore IT band, a little pain in the middle of my shins, and tenderness/dull pain on the sides of my knees and patella/top of tibia.  
I have been going to PT since January of this year, where I do leg press, leg extension, hip extension, hip abduction, wall squats, and ball balancing. Also, every day I do a standing quad stretch, calf stretch, standing hip stretch, and hamstring stretch. I then ice afterwards.  
I haven't run/played soccer/anything since November of last year. I have done all of these rehabilitate things and while it's gotten better, I still have pain all over.  
Does anyone have any ideas of what I should do? My PT guy says its tendonitis and that I just need to keep stretching and strengthening, but I am nervous with how long it has been. I am thinking of going to get a second opinion. Has anyone ever experienced anything like this before? What did you do?