Yes, go ahead with the CT scans and MRIs, but I can assure you that everything will be normal
I was the same way with my jaws, when they were in horrible pain I thought maybe I have a crack in the jaw or something, but obviously every test imaginable was normal. At this time, I gave up on testing and trying
I am also in my late 20-s and have a toddler, so this also added to my anxiety. I was having panik attacks due to this, but thanks God, they are long gone. And yes, I was also exercising in a gym 4 days a week until this all started; I have not been in a gym for 2 months due to pain, but I think I will restart exercise soon.
Have all the tests done for the piece of mind, but be prepared to kind of calm down when everything comes back normal. Sometimes there are things that are beyond the scope of traditional medicine and we just have to live through it. I was in a horrible muscular pain for almost 6 months and nothing wrong was found, but it subsides now. Yours will subside too, you just have to hang in there. Good luck!